You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I support you today?

USER: I am Alexander White. I need to cancel my reservation due to some personal issues.So can you help me with cancellation of my reservation?

ASSISTANT: Sure, I'll help you in cancellation. Please wait a moment I will check the reservation status.

USER: Sure.

ASSISTANT: Thank you for waiting. I am sorry to say that, there is no active reservation found with your name in our database to cancel it.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for approaching us.