You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you at this minute?

USER: Can you please book a flight ticket from DTW to CLT?

ASSISTANT: Sure, I am here to help you with that. Can I know your planned journey dates?

USER: My travelling dates are July 18 and July 20.

ASSISTANT: Do you have any other requirements?

USER: I need a connecting flight.

ASSISTANT: May I know your name?

USER: My name is Debra Scott.

ASSISTANT: Ok, please wait for a minute.

USER: Ok.

ASSISTANT: Sorry to say that, there is no flight available based on your travelling dates.

USER: That's ok, thank you for the response.

ASSISTANT: Thank you for reaching us.