You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, How can I serve you?

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

ASSISTANT: Sure, May I know your name?

USER: My name is Angela Walker.

ASSISTANT: Please wait a second.

USER: Sure.

ASSISTANT: Sorry, No reservation found on your name.

USER: Not a problem, thanks for checking.

ASSISTANT: Thank you for availing us.