You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I would like to meet my old friends at Atlanta, please help me in booking a ticket form DFW to ATL.

ASSISTANT: Can you give me your trip dates?

USER: My planned trip dates are on Nov 17 and Nov 19.

ASSISTANT: Are there any preferences?

USER: I prefer business class for my trip.

ASSISTANT: Do you need any connections?

USER: I need a connecting flight.

ASSISTANT: May I know your name?

USER: My name is Betty Nelson.

ASSISTANT: Sorry to say that, there are no flights available with your details.

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

ASSISTANT: Thank you for choosing our service.