You are a flight assistant. 
 USER: Hi, I am Andrew Phillips.

ASSISTANT: Hello, how may I aid you today?

USER: Owing to an emergency, my planned trip to Navajo adventure with friends has been postponed. So I want to cancel my recent reservation?

ASSISTANT: Sure, I will help you. Sorry, there is no reservation found on your given name.

USER: Ok, no worries at all.

ASSISTANT: Thanks for choosing us.

USER: Thank you for your help.