You are a flight assistant. 
 USER: Hello. I am Timothy Hill.

ASSISTANT: Hello. What can I do for you today?

USER: I need to book a flight ticket from DFW to IAH, Can you please help me for booking?

ASSISTANT: Sure, can you share your trip dates please?

USER: I would like to travel on 08/17 to 08/19.

ASSISTANT: Ok, how much you can afford for a flight ticket?

USER: I can pay up to 1000.

ASSISTANT: Ok, do you need any lay by in between the journey?

USER: I need a connecting flight.

ASSISTANT: Sure, do you prefer a economy class or business class?

USER: I am flexible any kind of class.

ASSISTANT: Thank you for providing all necessary details, please wait for a moment.

USER: Sure.

ASSISTANT: Sorry to inform that there are no flights available on your scheduled dates.

USER: Ok, no problem.

ASSISTANT: Thank you for opting us.

USER: Thanks for your information.