Telegram Bot inline keyboard to prompt user for the time for their apppointment

main.py

def sendInlineMessageForBookingTime(chat_id):
    text_message='Please choose a time slot...'
    current_time=datetime.datetime.now()
    current_hour=str(current_time)[11:13]
    # ----------- Chunk of if statement to determine which inline keyboard to reply user ----------------
    if int(current_hour) < 8:
        keyboard={'keyboard':[
                            [{'text':'08:00'}],[{'text':'10:00'}],
                            [{'text':'12:00'}],[{'text':'14:00'}],
                            [{'text':'16:00'}],[{'text':'18:00'}],
                            ]}
    elif 8<=int(current_hour)<10:
        keyboard={'keyboard':[
                            [{'text':'10:00'}],
                            [{'text':'12:00'}],[{'text':'14:00'}],
                            [{'text':'16:00'}],[{'text':'18:00'}],
                            ]}
    elif 10<=int(current_hour)<12:
        keyboard={'keyboard':[
                            [{'text':'12:00'}],[{'text':'14:00'}],
                            [{'text':'16:00'}],[{'text':'18:00'}],
                            ]}
    elif 12<=int(current_hour)<14:
        keyboard={'keyboard':[
                            [{'text':'14:00'}],
                            [{'text':'16:00'}],[{'text':'18:00'}],
                            ]}
    elif 14<=int(current_hour)<16:
        keyboard={'keyboard':[
                            [{'text':'16:00'}],[{'text':'18:00'}],
                            ]}
    elif 16<=int(current_hour)<18:
        keyboard={'keyboard':[
                            [{'text':'18:00'}],
                            ]}
    else:
        return sendMessage(chat_id,'Please try again tmr')
    #----------------------------------------------------------------------------------------------------
    key=json.JSONEncoder().encode(keyboard)
    url='https://api.telegram.org/bot'+str(api_key)+'/sendmessage?chat_id='+str(chat_id)+'&text='+str(text_message)+'&reply_markup='+key
    response = requests.get(url)
    return response