You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I serve you?

USER: Gregory Perez here. I would like to cancel my recent reservation because of change of plans.

ASSISTANT: Sure. Wait for a moment please.

USER: Sure.

ASSISTANT: Thanks for your time. I have found your flight reservation and successfully cancelled it.

USER: Thank you for your time and service.

ASSISTANT: Thank you.