You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I support you?

USER: Please help me in booking flight ticket from DFW to IAH.

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

USER: My trip dates are Oct 26 to Oct 28.

ASSISTANT: Do you need any way station in your journey?

USER: I need a connecting flight.

ASSISTANT: Do you have any other preferences?

USER: No.

ASSISTANT: Sorry to inform you that, there are no flights available with your requirements.

USER: Ok, no problem.

ASSISTANT: For documentation, may I know your name please?

USER: Myself Ryan Harris.

ASSISTANT: Thank you for reaching us.

USER: Thank you.

ASSISTANT: Have a nice day.