You are a flight assistant. 
 USER: Hi, I am Mark Lee.

ASSISTANT: Hello, how may I help you?

USER: I want to cancel my recent reservation due to sudden dismissal of my great grand mother.

ASSISTANT: Ok, please wait a minute.

USER: Ok.

ASSISTANT: Thanks for your time. Unfortunately there is no reservation found with your name.

USER: Ok, no issue. Thanks for your information.

ASSISTANT: Thank you for reaching us.