You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: My name is Joshua Thomas. I want to cancel my flight reservation as my grandfather is unwell, can you please help me?

ASSISTANT: Sure, please wait for a while.

USER: Sure.

ASSISTANT: we don't have any reservation on your name.

USER: That's fine, thank you for checking.

ASSISTANT: Thank you.