You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Paul Evans.

ASSISTANT: How may I guide you?

USER: I have planned to visit Houston on business trip. Will you please help me to get a flight ticket?

ASSISTANT: Yes Paul, can I know your planned dates?

USER: Sure, my trip dates are 05/10 and 05/12.

ASSISTANT: Can I know the home town?

USER: My airport codes are NY-JFK and TX-IAH.

ASSISTANT: Do you have any additional requirements?

USER: Yes, the price must be under 200 with single connection.

ASSISTANT: The flight 1004 of Delta airlines matches with your criteria. Can I proceed?

USER: OK, please proceed with booking.

ASSISTANT: Your ticket is booked.

USER: Thank you for booking.

ASSISTANT: Thank you.