You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

USER: Can you please book a ticket from IAH to IAH? I am planning for a round trip.

ASSISTANT: Sure, may I know your trip dates?

USER: I will depart on 08/27 and return on 08/29.

ASSISTANT: Can I have your good name please?

USER: My name is Stephen Walker,.

ASSISTANT: There is a flight available from Spirit airlines with travel charge of 100, shall I proceed booking?

USER: That's fine for me, please proceed.

ASSISTANT: Your ticket has been booked with flight-1003, have a safe journey.

USER: Thank you very much.

ASSISTANT: Thank you for choosing us.