You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I guide you?

USER: I am Christopher Thomas. I need to book a ticket with fare of 5000, so could you please help me in doing that?

ASSISTANT: Sure, can I know your preferable dates?

USER: My travelling dates are 12/09 and return on 12/11.

ASSISTANT: Ok, can I know your airport codes?

USER: My airport codes are HOU and EWR.

ASSISTANT: I found a flight 1007 of AA airlines matches with your preferences, can I proceed?

USER: You can proceed with booking.

ASSISTANT: Your ticket is booked.

USER: Thank you.

ASSISTANT: Thank you, have a great day ahead.