You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you at this moment?

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

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

USER: Thank you.

ASSISTANT: Please allow me a moment to check for your previous reservation status. May I know your name?

USER: Sure, I will wait. Sure, my name is Brenda Harris.

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

USER: Ok, no problem.

ASSISTANT: Thank you for reaching us.

USER: Anyways, thank you for your service.

ASSISTANT: You are welcome.