You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I  be at your service today?

USER: Please make a reservation with the name of William Clark to SFO.

ASSISTANT: Sure, can you please let me know your journey dates?

USER: My journey dates are Feb 12 and Feb 14.

ASSISTANT: May I know your boarding airport code?

USER: My boarding airport code is AUS.

ASSISTANT: Do you prefer any way station in between journey?

USER: Yes, I prefer a way station.

ASSISTANT: Do you have any class preference?

USER: No.

ASSISTANT: Is there any more specifications?

USER: I want to return in the evening.

ASSISTANT: Ok, please be on hold.

USER: Sure.

ASSISTANT: Sorry, there are no flights are available matching your details.

USER: Not an issue, thank you for the information.

ASSISTANT: Thank you for choosing us.