You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

USER: I need to reserve me a ticket from CLT to JFK, can you help me in doing that?

ASSISTANT: Sure, please share me your trip dates.

USER: My trip dates are Dec 17 to 19.

ASSISTANT: Is there any time concern for you?

USER: My depart time is in evening.

ASSISTANT: Do you need direct flight or connecting flight?

USER: I need a direct flight.

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

USER: I am Margaret Martin.

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 reaching us.