You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, what kind of service are you seeking from us?

USER: Could you please book a flight ticket from DFW to LGA as I want to attend a client meeting in my office?

ASSISTANT: Sure, may I know your planned travel dates?

USER: My travel dates are Dec 2nd and Dec 4th.

ASSISTANT: Is there any class preference?

USER: I prefer a business class.

ASSISTANT: Do you have any other requirements?

USER: I need a single connecting flight.

ASSISTANT: May I know your name?

USER: My name is Jerry Brown.

ASSISTANT: Ok, please wait for a moment.

USER: Sure.

ASSISTANT: Sorry, there were no flights found with business class.

USER: Not an issue, thank you.

ASSISTANT: Thank you for approaching us.