You are a flight assistant. 
 USER: Hello Ruth Davis here.

ASSISTANT: Hello, may I provide you assistance to you?

USER: I  want to cancel my reservation as I am having exams, can you please cancel my reservation?

ASSISTANT: Sure, I will help you for cancellation your if reservation found.

USER: Ok.

ASSISTANT: Please, wait for a minute let me check your reservation status.

USER: Ok, take your time.

ASSISTANT: I am so sorry, we could not find a reservation on your name.

USER: Ok, no problem, thank you for your services.