You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you out?

USER: I am Frank Walker. I would like to book a ticket from DEN to IAH, can you help me?

ASSISTANT: Sure, I will help you in booking the ticket. May I know your travelling dates please?

USER: My travel dates are 04/19 and 04/21.

ASSISTANT: There is a flight with connection 1 and price 200, can I proceed?

USER: You can book it.

ASSISTANT: Ok, your ticket has been booked with flight number 1007.

USER: Thank you for booking.

ASSISTANT: Thank you for choosing us.