You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Melisa Davis.

ASSISTANT: How may I aid you today?

USER: I am planning to book a ticket from DEN to JFK. Can you please help me out to book a ticket for me?

ASSISTANT: Sure, we are glad to help you in booking.

USER: Thank you.

ASSISTANT: Could you please help me by providing your travelling dates?

USER: I would like to travel on Mar 30 and return back on Apr 01.

ASSISTANT: May I know if you prefer to have any other comforts in your journey?

USER: Yes, I am looking for a connecting flight.

ASSISTANT: Thank you for providing your details, please wait for a while.

USER: Sure.

ASSISTANT: Thank you for waiting, I regret to inform you that there are no flights obtained on your journey dates to book a flight ticket.

USER: That's fine.

ASSISTANT: Thank you for opting us.

USER: Thank you for your service.