You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I guide you for today?

USER: I am Dennis Hernandez. I want to cancel my reservation, so please help me in the cancellation.

ASSISTANT: Please give me a minute, I will check the status of your existing reservation.

USER: Ok.

ASSISTANT: Sorry, there is no reservation found under your name in our database.

USER: Not an issue. Thank you.

ASSISTANT: Thank you for contacting us, have a nice day.