You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, we are glad to have you as a customer. How may I aid you?

USER: My name is Jack Evans and I want to cancel my resent reservation.Can you help me out with this?

ASSISTANT: Sure, please wait for a while, let me check and revert to you.

USER: Sure.

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

USER: OK, thank you for your information.

ASSISTANT: pleasure to serve you, thanks for contacting us.