You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I guide you today?

USER: My name is Sarah Hall. Owing an emergency, I want to cancel my reservation.

ASSISTANT: Sure, I will help you.

USER: Thank you.

ASSISTANT: Please wait a moment.

USER: Sure, you can take your time.

ASSISTANT: Sorry, I did not find any reservation on your to cancel your reservation.

USER: That's ok. Thank you for checking.

ASSISTANT: Welcome, have a nice day.