You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

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

ASSISTANT: Sure, may I know your travel dates?

USER: I would like to travel on Mar 19 and again I will return back on Mar 21.

ASSISTANT: Do you have any connection limit?

USER: I am planning to travel in direct flight.

ASSISTANT: Is there any other specifications?

USER: No.

ASSISTANT: Please share your name.

USER: Myself Kenneth Phillips.

ASSISTANT: OK, please wait a moment.

USER: Sure.

ASSISTANT: Sorry to say,  no flights found with your requirement.

USER: Not a big deal, anyhow thank you very much for your kind information.

ASSISTANT: Thanks for reaching us.