You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you today?

USER: Can you please help me in reserving my flight from PHL to reach DEN?

ASSISTANT: Sure, may I know your travel dates?

USER: Sure, my planned travel dates are Apr 25th and Apr 27th.

ASSISTANT: Do you need any flag over in between journey?

USER: I would like to travel in a single connecting flight.

ASSISTANT: Is there any class preference?

USER: I prefer business class.

ASSISTANT: May I know your arrival and depart timings?

USER: I must return in the morning time.

ASSISTANT: Do you have any other specifications?

USER: No.

ASSISTANT: Please be on hold.

USER: Ok, sure.

ASSISTANT: Sorry, there are no flights found on your routes.

USER: Ok, not a problem.

ASSISTANT: Please forward your name.

USER: My name is Carol Robinson.

ASSISTANT: Thank you for availing us.

USER: Thanks for the information.