You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: Myself Sarah Young. I need to schedule my trip to visit San Francisco. Can you please help me in reserving the ticket from DFW to SFO?

ASSISTANT: May I know your trip dates?'.

USER: I am willing to drop-off Aug 31 and again I will return back on Sept 2.

ASSISTANT: Do you prefer any connections?

USER: I am flexible with single connection.

ASSISTANT: Do you prefer any specification?

USER: My class preference is business.

ASSISTANT: There are no flights found on your route.

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

ASSISTANT: Thank you.