You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I serve you the best today?

USER: I am planning to book a flight from DFW to reach Boston, will you please help me in booking a flight?

ASSISTANT: Sure, we are pleased to serve you.

USER: Thank you.

ASSISTANT: Can you share me your trip dates?

USER: My planned dates are on Mar 14th to 16th.

ASSISTANT: Do you need any way station in your journey?

USER: Yes, I need it.

ASSISTANT: Is there any class preference for you?

USER: I prefer a business class.

ASSISTANT: Do you have any other preferences?

USER: No.

ASSISTANT: To proceed further, May I know your good name please?

USER: Sure, my name is Anthony Collins.

ASSISTANT: Sorry to inform you that, there are no flights available with your specifications.

USER: No issues, thank you.

ASSISTANT: Thank you for opting us, have a good day.