You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you today?

USER: I am Barbara Parker. I am planning to book a ticket from IAH to IAD. Can you please help me out?

ASSISTANT: Sure, let me know your preferred journey dates.

USER: I am planning to travel on Sept 30 and return back on Oct 02.

ASSISTANT: Ok, Do you have any connection limit?

USER: Yes, I am looking for a connecting flight.

ASSISTANT: Is there any class preference?

USER: No, I am ok with any class.

ASSISTANT: Sure, may I know your depart and arrival timings?

USER: My depart time should be  afternoon.

ASSISTANT: Thanks for your time, please wait for a while.

USER: Sure.

ASSISTANT: I apologie to say this, there are no flights which can travels to your region as per your requirements.

USER: That's fine, thank you for your service.

ASSISTANT: Thank you for reaching us.