You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I am planning to meet my school friend in Denver, so please book a flight from ATL to DEN.

ASSISTANT: Sure, I am glad to help you in booking a flight ticket. May I know your planned dates?

USER: My departure day is Aug 02, return day is Aug 04.

ASSISTANT: Is there any connection limit preference?

USER: Yes, I need a connecting flight.

ASSISTANT: Is there any class preference?

USER: No.

ASSISTANT: Do you have any airline preference?

USER: No.

ASSISTANT: Are you comfortable with any timings?

USER: No, my return time should be afternoon.

ASSISTANT: Could you help me with your name please?

USER: My name is Kevin Anderson.

ASSISTANT: Kevin Anderson, I am afraid that there is no flight available for this route.

USER: Not an issue, thank you.

ASSISTANT: Thank you for reaching us.