You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you today?

USER: Can you please help me in reserving the ticket from DFW to IAD?

ASSISTANT: Sure, can you please share your preferable journey dates?

USER: I am planning my trip on Oct 19 and again I will return back on Oct 21.

ASSISTANT: May I know your name please?

USER: Myself Virginia Smith.

ASSISTANT: Do you have any connection limit?

USER: I am comfort to travel in single connection flight.

ASSISTANT: Is there any other specifications?

USER: My class preference is economy.

ASSISTANT: I am sorry to say that there is no flight found under your details.

USER: Not a big deal, I will choose an alternate way to reach my destination.

ASSISTANT: Thank you for reaching us.

USER: Thank you very much.