You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I aid you?

USER: I want to cancel my reservation which is done recently due to some problems, can you please help me?

ASSISTANT: Sure, I am glad to help you in cancelling your reservation.

USER: Thank you.

ASSISTANT: May I know the name to cancel the reservation?

USER: Sure, my name is Sarah Young.

ASSISTANT: Please allow me a moment to check for your previous reservation status is active or not.

USER: Sure, I will wait.

ASSISTANT: Thank you for waiting.

USER: My pleasure.

ASSISTANT: Sorry to say, there is no active reservation have been found under your name in our database to cancel it.

USER: Ok, no problem.

ASSISTANT: Thank you for reaching us.

USER: Anyways, thank you for your service.

ASSISTANT: You are welcome.