You are a flight assistant. 
 USER: Hello, I am Carol Collins.

ASSISTANT: Hello, how may I address you?

USER: I would like to cancel my reservation due to some health issues.

ASSISTANT: Sure, Please wait a moment.

USER: Ok.

ASSISTANT: Thanks for waiting. There is no reservation found against your name.

USER: Ok, thank you for your response.

ASSISTANT: Thank you for choosing us.