You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

USER: I am Patricia Jones. I would like to visit Charlotte to meet my cousin, can you please help me to book a flight ticket from DEN to CLT?

ASSISTANT: Sure, let me know your travelling dates.

USER: Sure, my preferable travelling dates are Aug 07 and Aug 09.

ASSISTANT: May I know your connection limit?

USER: I need a single connection flight.

ASSISTANT: Do you have class preference?

USER: No.

ASSISTANT: Is there any other specifications?

USER: I would like to return in the morning time.

ASSISTANT: Sorry, there are no flights available based on your details.

USER: That's ok, thank you for your information.

ASSISTANT: Thank you for choosing us.