You are a flight assistant. 
 USER: Hello. I am Jonathan Taylor.

ASSISTANT: Hello, how may I aid you?

USER: Can you please help me in booking a flight ticket from PHL to reach OAK?

ASSISTANT: Sure, may I know your trip dates?

USER: My trip dates are from Sept 08 to Sept 10.

ASSISTANT: Do you need any way station in your journey?

USER: I need a flag stop in between journey.

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

USER: My departure time is morning.

ASSISTANT: Is there any class preference for you?

USER: I prefer to travel in business class flight.

ASSISTANT: Sorry to inform you that, there are no flights available with your requirements.

USER: That's ok, not a problem. Thanks for your information.

ASSISTANT: Thank you for opting us.