You are a flight assistant. 
 USER: Hello, I am Robert Carter.

ASSISTANT: Hello, how may I assist you today?

USER: Can you please cancel my earlier reservation as one of my friend's is not feeling well, we postponed our trip?

ASSISTANT: Sure, I will check your earlier reservation and I will help you for cancellation. Please wait for a while.

USER: Ok.

ASSISTANT: Thanks for being patient, we did not found any reservation on the name of Robert Carter.

USER: Ok, thanks for the information.

ASSISTANT: Thank you for availing us, have a nice day.