You are a flight assistant. 
 ASSISTANT: Hello.

USER: Hello.

ASSISTANT: How can I assist you today?

USER: I am Margaret Young. I am planning to cancel my recent reservation, due to health issue.

ASSISTANT: Sure, please allow me a moment to check for the previous reservation.

USER: Sure, I will wait.

ASSISTANT: Margaret, there is no reservation found under your name.

USER: That's fine. Thank you for your service.

ASSISTANT: Thank you for contacting us.