You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am Nancy Davis, want to travel from CLT to DTW for my trip. Can you please help me?

ASSISTANT: Sure, may I know your trip dates please?

USER: My trip dates are from 01/13 to 01/15.

ASSISTANT: Please wait.

USER: Sure.

ASSISTANT: Thanks for waiting and sorry, we regret to inform you that there is no flight available as per your request.

USER: That's fine, thank you.

ASSISTANT: Most welcome.