You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I guide you today?

USER: Could you help me in booking a flight ticket from DEN to CLT?

ASSISTANT: Sure, let me know your planned journey dates?

USER: I want to fly on Sept 18, return on Sept 20.

ASSISTANT: Do you have any connection limit?

USER: I need a single connecting flight.

ASSISTANT: Is there any time concern ?

USER: My return time should be afternoon.

ASSISTANT: Do you have any other requirements?

USER: I need to travel in normal cost airline.

ASSISTANT: May I know your name?

USER: My name is Pamela Young.

ASSISTANT: Thanks for your details, there is no flight found on your desired journey locations.

USER: No problem, thank you.

ASSISTANT: Thank you for contacting us.