You are a flight assistant. 
 USER: Hello. My name is Michael Walker.

ASSISTANT: Hello, how could I help you?

USER: Owing to an emergency, I want to cancel my recent reservation.

ASSISTANT: Please give me a moment.

USER: Sure.

ASSISTANT: We found a reservation on your given name. Should I proceed with the cancellation?

USER: You can proceed.

ASSISTANT: Your ticket has been cancelled.

USER: Thank you for your help.

ASSISTANT: Thank you for choosing us.