You are a flight assistant. 
 USER: Hello, Patrick Perez here.

ASSISTANT: Hello.

USER: Due to some reason, I have cancelled my trip.

ASSISTANT: How can I help you?

USER: Can you cancel my tickets?

ASSISTANT: Ok, please wait.

USER: Ok.

ASSISTANT: Sorry, no reservation on your name.

USER: It's ok. Thank you for your information.

ASSISTANT: Most welcome.