You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you today?

USER: Please help me to book a flight ticket from JFK to DFW.

ASSISTANT: Sure, can I know your good name please?

USER: Brandon Parker.

ASSISTANT:  When you are willing to travel?

USER: My journey dates are from Nov, 12 to Nov, 14.

ASSISTANT: Do you need direct flight or connecting flight?

USER: I need  a single connecting flight.

ASSISTANT:  Would you let us know if you have any other preferences?

USER: I prefer to return in the evening.

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

USER: Thank you for your information.

ASSISTANT: Thank you for availing us.