You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you?

USER: Can you please help me in booking my ticket from DEN to JFK?

ASSISTANT: May I know your trip dates?

USER: My trip dates are from 11/16 to 11/18.

ASSISTANT: Do you prefer any connections?

USER: Yes, I need a connecting flight.

ASSISTANT: Do you prefer any specifications?

USER: I am looking for business class.

ASSISTANT: May I know your name?

USER: My name is Michael Jackson.

ASSISTANT: No flights found on your route.

USER: It's ok, thank you.

ASSISTANT: Thank you.