You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: Betty Phillips here. Can you please help me in booking a flight ticket from BOS to DEN?

ASSISTANT: Sure, we are here to help you. Can you share me your itinerary dates?

USER: Sure, my travel dates are from Apr 01 to Apr 03.

ASSISTANT: Do you need any flag stop in your journey?

USER: Yes, I need a connecting flight.

ASSISTANT: May I know your departure time and arrival time?

USER: My return time is afternoon.

ASSISTANT: Sorry to say, there are no flights available with your request.

USER: That's ok, no problem. Thank you for the information.

ASSISTANT: Thank you for choosing us.