You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: Actually 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. Can you help me with cancelling the reservation,.

ASSISTANT: Sure, may I know your name please?

USER: I am William Brown,.

ASSISTANT: Please wait for a minute.

USER: Sure.

ASSISTANT: Thanks for your time, we found a reservation by your name and it was cancelled successfully.

USER: Thank you for your quick service.

ASSISTANT: Thank you for reaching us.