You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Myself Debra Walker.

ASSISTANT: Debra, how can I help you today?

USER: I would like to cancel my reservation because my health is not good.

ASSISTANT: Sure, I am gleeful to help you. Please wait for a moment.

USER: Sure, take your own time.

ASSISTANT: Debra, I found your reservation and cancelled it successfully.

USER: Thank you for cancelling my reservation.

ASSISTANT: It's my pleasure, have a nice day.