You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Donna Anderson.

ASSISTANT: How can I assist you today?

USER: I want to cancel my recent reservation due to my health issue so, can you help me with this?

ASSISTANT: Sure, I can help you with that. Please wait for a while.

USER: Sure, take your time.

ASSISTANT: Donna Anderson, there is no reservation found active under your name to do cancellation.

USER: Not a problem, thank you for checking.

ASSISTANT: Thank you so much for choosing us.