You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am Catherine Harris, I would like to cancel my recent reservation, can you help me with this?

ASSISTANT: Ok, please hold on a moment I will revert you back with the proper information.

USER: Sure, take your own time.

ASSISTANT: Sorry Catherine Harris, there is no reservation found on your name to cancel it.

USER: That's fine, thanks for your information.

ASSISTANT: Thanks for contacting us.