You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I provide assistance to you?

USER: I am James Collins and I just want to cancel my recent reservation due to my trip got cancelled. Can you help me with this?

ASSISTANT: Sure, we are here to help you.

USER: Ok.

ASSISTANT: Please wait.

USER: Sure.

ASSISTANT: Sorry, there is no reservation found.

USER: Ok, not a problem. Thank you.