You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I support you today?

USER: I want to schedule my trip to LAX from OAK, can you please book me a flight ticket?

ASSISTANT: Sure, please share me your trip dates.

USER: My trip dates are from Aug 17th to Aug 19th.

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

USER: I am Mary Brown.

ASSISTANT: Do you need direct flight or connecting flight?

USER: I prefer a connecting flight.

ASSISTANT: May I know your class preferences?

USER: I am comfortable with any class.

ASSISTANT: Is there any time concern for you?

USER: No, I am comfortable with any timings.

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

USER: Ok, no problem.

ASSISTANT: Thank you for opting us.

USER: Thank you.