You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am Stephen Collins. I want to book a ticket from DFW to JFK to attend seminar, can you help me in booking?

ASSISTANT: Sure, can I know your travelling dates?

USER: I am departing on Jan 26 and return on Jan 28.

ASSISTANT: Do you have any particular time for departing and returning?

USER: I want to depart in afternoon.

ASSISTANT: Which class do you prefer?

USER: I am ok with any class.

ASSISTANT: Would you like to prefer direct flight or connecting flight?

USER: I need a flight with connection limit 1.

ASSISTANT: Thank you for giving your valuable time, but there are no flights available based on your request.

USER: That's ok, thank you for your information.

ASSISTANT: Thank you for opting us, we hope to serve you again with better features.