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

ASSISTANT: Hello, how may I help you?

USER: Actually, I booked a ticket to NYC for a concert but due to bad weather, I want to cancel my trip.

ASSISTANT: Please give me a minute to check the database.

USER: Sure, take your time.

ASSISTANT: Sorry, no reservation is found on your given name.

USER: That's ok.

ASSISTANT: Thank you.

USER: Thank you for your help.