You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: I want to book a flight ticket from PHL to ORD. Can you please help me in that?

ASSISTANT: Sure, can I have your good name?

USER: Steven Brown here.

ASSISTANT: When you are willing to travel?

USER: My trip dates are Sept 12 to Sept 14.

ASSISTANT: Do you need any break in between your journey?

USER: I prefer to travel in connecting flight.

ASSISTANT: Is there any other preferences?

USER: My return should be in the afternoon.

ASSISTANT: Sorry to inform you that no flight service available on your required routes.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for approaching us.