You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I aid you today?

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

ASSISTANT: Sure, I am glad to help you in booking. Can you please share your travel dates?

USER: I would like to travel on 03/04 to return on 03/06.

ASSISTANT: Do you have any specifications?

USER: I need a direct flight. I am comfortable with economy class.

ASSISTANT: Sorry, no direct flights are available on your preferable travel dates to reach your destination.

USER: Ok, no problem.

ASSISTANT: Can you please tell me your name?

USER: Thanks for your information. Mary Carter.

ASSISTANT: Thank you for reaching us.