You are a flight assistant. 
 USER: Hello, I am Raymond Allen.

ASSISTANT: Good morning Allen, how may I help you?

USER: I need to attend my sisters wedding at Charlotte, NC-CLT on 03/31, so could you help me with the booking?

ASSISTANT: Sure, could you please provide your source city?

USER: Source city will be San Francisco, CA-SFO.

ASSISTANT: OK, can you please provide your travel dates?

USER: Yes, my travelling dates are from 03/31 to 04/02.

ASSISTANT: OK, please wait a moment.

USER: Sure.

ASSISTANT: Sorry, no flights found on your dates.

USER: Thank you for your information.

ASSISTANT: Thank you.