You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, what kind of assistance are you looking for?

USER: Can you please reserve me a flight ticket from DTW to LAS?

ASSISTANT: Sure, may I know your scheduled travel dates?

USER: My planned travel dates are from Aug 7th to Aug 9th.

ASSISTANT: Do you have any preferable timings to travel?

USER: Yes, I want to return in the afternoon.

ASSISTANT: Do you have any other requirements?

USER: I would prefer a single connection in between my journey.

ASSISTANT: To proceed further, may I know your name?

USER: I am Kathleen Walker.

ASSISTANT: Ok, please wait for a minute.

USER: Ok.

ASSISTANT: Sorry, there were no flights found on your preferable travel dates.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for reaching us.