You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, what can I do for you today?

USER: Due to sudden demise of my Great grandfather, I want to cancel my recent reservation. Can you please cancel my reservation which was made on the name of John Davis?

ASSISTANT: Sure, we are here to aid you. Please wait for sometime.

USER: Sure, I will wait.

ASSISTANT: Thank you for waiting, we found a reservation on your name and it is cancelled successfully.

USER: Ok, Thank you for your service.

ASSISTANT: Thank you for availing us.