You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: I am Rebecca Evans. I want to book a flight ticket from Detroit DTW to Charlotte CLT. Can you make a reservation for me?

ASSISTANT: Sure, may I know your travelling dates?

USER: Sure, my journey dates are on May 25 and return on May 27.

ASSISTANT: Do you have any class preference?

USER: No, but I want to return in the evening time.

ASSISTANT: Is there any other preferences, do you have?

USER: Yes, I need a single connecting flight to travel.

ASSISTANT: Ok, please wait for a while.

USER: Sure, take your time.

ASSISTANT: Sorry, no flights are available as per your requirements.

USER: Ok, not an issue. Thank you for your information.

ASSISTANT: Thank you for choosing us.