You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

USER: I have an urgent meeting at Atlanta. Can you book a flight ticket from EWR to ATL?

ASSISTANT: Sure, please share me your trip dates.

USER: July, 13 and July, 15 are my preferable travel dates.

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

USER: My name is Jeffrey Clark.

ASSISTANT:  Do you need direct flight or connecting flight?

USER: I would prefer to direct 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, thank you.

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

USER: That's ok, no problem.

ASSISTANT: Thank you for opting us.

USER: Thank you.