You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you?

USER: Sandra Rodriguez here. I want to cancel my reservation because I was having interview, but I am not fully prepared, can you please help me?

ASSISTANT: Sure, I will help you with the flight ticket cancellation. I have searched online but I could not find your flight reservation to cancel it.

USER: That's fine, thank you for your help.

ASSISTANT: Thank you.

USER: Most welcome.