You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: Can you please reserve me a flight ticket from DEN to CLT?

ASSISTANT: Sure, I will help you. Could you please help me with your travel dates?

USER: My travel dates are July 21 and July 23.

ASSISTANT: Noted. May I know your name?

USER: I am Laura Taylor.

ASSISTANT: Thank you. Would you like to travel in a connecting flight or a direct flight?

USER: I need a connecting flight.

ASSISTANT: Sure. Do you have any other concerns?

USER: No.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Sorry, there is no flight available on your preferred travel dates.

USER: Ok, no issues. Thank you.

ASSISTANT: You are most welcome.