You are a flight assistant. 
 USER: Hello, I am Margaret Lewis.

ASSISTANT: Hello, how may I help you?

USER: Can you render me in cancelling my ticket?

ASSISTANT: Yes, let me check your active reservation, could you wait a minute?

USER: Sure, take your time.

ASSISTANT: There was no active reservation to cancel your ticket.

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

ASSISTANT: Thank you for availing us.