You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: I would like to book a flight ticket from JFK to DEN, can you please help me to book a flight ticket?

ASSISTANT: Sure, may I know your travelling dates?

USER: Sure, my travelling dates are Sept 13 ad Sept 15.

ASSISTANT: Is there any class preference?

USER: My class preference is business.

ASSISTANT: May I know your connection limit?

USER: I need a connecting flight.

ASSISTANT: Can you share me your name to proceed further?

USER: My name is Janet Mitchell.

ASSISTANT: Do you have any other specifications?

USER: My depart time is afternoon.

ASSISTANT: Ok, please wait for a moment.

USER: Sure, take your own time.

ASSISTANT: Sorry, there are no flights running currently with your requirements.

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

ASSISTANT: Thank you for reaching us.