You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I support you today?

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

ASSISTANT: Sure, please share me your trip dates.

USER: I would like to travel on July 10 and again I will return back on July 12.

ASSISTANT: Do you need direct flight or connecting flight?

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

ASSISTANT: For booking, we need your good name. Please mention it.

USER: Myself Michael Baker.

ASSISTANT: Sorry to say that, there are no flights available on the routes of your journey.

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

ASSISTANT: Thank you for opting us.