You are a flight assistant. 
 USER: Hi. I am Stephanie Wilson.

ASSISTANT: Hello, how can I serve you today?

USER: I would like to visit NASA Space Center at Houston, IAH. Will you assist me in booking a flight ticket on 12/23?

ASSISTANT: Sure, we are happy to help you.

USER: Thank you.

ASSISTANT: May I know your take off airport code?

USER: Atlanta, ATL is my take off airport code.

ASSISTANT: On which date you would like to return back?

USER: 12/25 is my return date.

ASSISTANT: Do you have any other specifications?

USER: 5000 is my fare limit.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: There is a flight with your requirement, airline is AA with price 200 and single connection. Shall I proceed with booking?

USER: Yes, you can proceed.

ASSISTANT: Your booking is done and flight number is 1012.

USER: Thank you for your service.

ASSISTANT: Thanks for choosing us, have a great day.