You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: ctually I made a earlier reservation to go for a trip with my friends, but heavy work load in office I want to change my reservation.

ASSISTANT: May I know your name to check for the previous reservation?

USER: My name is Carol Thomas.

ASSISTANT: Sorry, there is no reservation matching with your name in our portal to make changes further.

USER: That's ok, no problem.

ASSISTANT: Thank you for reaching us.

USER: Thank you for your information.