You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Kevin Williams here.

ASSISTANT: How may I guide you now?

USER: I want to attend a Marriage in Charlotte. Can you please help me for booking the flight ticket?

ASSISTANT: May I know your desirable dates for the following journey?

USER: My travelling dates are 01/29 and 01/31.

ASSISTANT: Ok, may I know your source location and airport code?

USER: My source location is Detroit and airport code is DTW.

ASSISTANT: Do you need a connecting flight?

USER: Yes.

ASSISTANT: May I know your depart and return time respectively?

USER: I want to return on morning.

ASSISTANT: Do you have any other preferences?

USER: I want to travel in economy class.

ASSISTANT: Kevin Williams, I am sorry to inform you. There is no flight available as per your requested details. Sorry for the inconvenience.

USER: Anyway, thanks for the information.

ASSISTANT: Thank you for choosing our agency services. Have a great day ahead.