You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am James Carter.

ASSISTANT: How may I guide you today?

USER: I am planning to attend a automobile expo at New York, can you please book me a ticket from DEN to JFK?

ASSISTANT: Sure, I will help you with that. Can you please share your preferable journey dates?

USER: I am planning to depart on Mar 16 and would like to return on Mar 18.

ASSISTANT: Do you have any class preference?

USER: I am comfortable with any class.

ASSISTANT: Is there any preference?

USER: I prefer connecting flight on this route.

ASSISTANT: I am sorry to say that there is no flight found under your details.

USER: That's ok, not an issue. Thank you for providing information.

ASSISTANT: Thank you for reaching us.