You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Angela Walker.

ASSISTANT: How should I assist you today?

USER: Due to some health issues, I want to cancel my recent reservation.

ASSISTANT: Sure, I will help you with that. Please wait a moment to find previous reservation to cancel.

USER: Sure.

ASSISTANT: Thank you for waiting. Sorry Walker, there is no reservation found under your name to cancel it.

USER: Ok, thank you for your information.

ASSISTANT: Thank you for choosing us. Have a good day.