You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: I'm James Collins. Recently I planned to go a vacation but due some circumstances I cant go to that vacation. Can you please cancel the reservation ticket?

ASSISTANT: Ok, James wait for a minute.

USER: Sure.

ASSISTANT: Sorry, James no reservation found on your name.

USER: Ok. Thank you for your help.

ASSISTANT: Thank you for approaching us.