You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you for the day?

USER: Can you help me to book a flight ticket from PHL to DEN?

ASSISTANT: Sure, can you please forward your journey dates?

USER: I want to fly on 29 Jan and return on 31 Jan.

ASSISTANT: May I know your name please?

USER: Kevin Williams.

ASSISTANT: May I know your connection limit please?

USER: I need a connecting flight.

ASSISTANT: Is there any more specifications in your journey?

USER: No.

ASSISTANT: Sorry to inform you that, we did not find any flights matching your credentials.

USER: It's ok, not an issue. Thank you.

ASSISTANT: Thank you for choosing us.