You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Helen Lee.

ASSISTANT: How may I help you?

USER: I am planning to visit Grand canyon adventure in New York, but due to an emergency work I could not visit the adventure.

ASSISTANT: Ok.

USER: Could you please assist me in cancellation?

ASSISTANT: Sure, I will help you. Please, wait a minute.

USER: Sure.

ASSISTANT: Thanks for waiting. I am sorry to inform you that, there is no reservation found on your name to proceed for cancellation.

USER: Ok, no issues at all. Thank you for your help.

ASSISTANT: Thank you for approaching us.