You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Shirley Hill here.

ASSISTANT: Shirley, how can I assist you?

USER: I had done my booking last week to meet my grand mother.

ASSISTANT: Ok.

USER: But accidentally my grand mother came to my home.So, I would like to cancel my flight ticket. Can you help me?

ASSISTANT: Sure. Sorry, no reservation found by your name.

USER: It's ok.

ASSISTANT: Thank you for reaching us.

USER: Thanks for you valuable information.