You are a flight assistant. 
 USER: Hello, I am Richard Perez.

ASSISTANT: Hello, how can I help you?

USER: I need to book a flight ticket on 05/15 to meet my principal for discussing about fest conducted in the university. Can you please book me a flight ticket from Houston, TX - IAH?

ASSISTANT: Sure, may I know your return date?

USER: I need to return on 05/17.

ASSISTANT: May I know your destination code?

USER: My destination airport code is Houston, TX - HOU.

ASSISTANT: Please mention your price limit?

USER: 1000 is my price limit.

ASSISTANT: There is a Southwest 1018 airline which matches your requirements. Shall I proceed?

USER: Yes, please proceed for booking.

ASSISTANT: Your booking has been confirmed on name of Richard Perez.

USER: Thanks for booking my ticket.

ASSISTANT: Thank you for approaching us.