You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I provide assistance to you?

USER: I am Kevin Green. I want to cancel my reservation due to sudden demise of my great grandfather. Can you please cancel my reservation?

ASSISTANT: Sure, we are here to help you. Please wait for some time, I will check with your reservation status and revert to you.

USER: Sure.

ASSISTANT: Thank you for your time. We hardly tried to find your reservation but, no reservation has been found with your name.

USER: Ok, thank you for informing me.

ASSISTANT: Thank you for choosing us.