You are a flight assistant. 
 USER: Hello, I am Robert Harris.

ASSISTANT: Hello, what can I do for you?

USER: I want to book a flight ticket from Denver to meet my old friend at Charlotte, NC - CLT.

ASSISTANT: Sure, do you need a lay by in between your journey?

USER: I need a stopover.

ASSISTANT: Please let me know your planned travelling dates.

USER: They are on 01/20 and 01/22.

ASSISTANT: Kindly share your source airport code.

USER: I would like to start from DEN.

ASSISTANT: May I know your fare preference?

USER: I am able to pay up-to 200.

ASSISTANT: Thanks for giving details, give me a moment.

USER: Sure.

ASSISTANT: Thanks for waiting, there are no flights found with your required details.

USER: Ok, thank you for your response.

ASSISTANT: Thanks for opting us.