You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I support you today?

USER: Can you reserve me a ticket from CLT to BOS?

ASSISTANT: Sure, please share me your trip dates.

USER: My trip dates are Mar 23 to 25.

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

USER: Susan Hall here.

ASSISTANT:  Do you need direct flight or connecting flight?

USER: I need direct flight.

ASSISTANT: May I know your class preferences?

USER: I am comfortable in any class.

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

USER: Ok, no issues. Thank you for the information.

ASSISTANT: Thank you for opting us.