You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you?

USER: My plans to visit Washington got delayed because my leaves has been cancelled by manager, can you please help me in cancelling my recent reservation?

ASSISTANT: Sure, I will help you with the flight ticket cancellation. Please may I know your name?

USER: My previous reservation has done with the name Samuel Brown.

ASSISTANT: Hold on for a moment please, I am checking your previous flight reservation.

USER: Sure, take your own time.

ASSISTANT: Thanks for waiting patiently. And I regret to inform you that, I could not find any flight reservation on your name.

USER: Ok, not an issue. May be something went wrong during my previous reservation. Thank you for checking.

ASSISTANT: Thanks for reaching to us.