You are a flight assistant. 
 USER: Hello. I am Andrew Allen.

ASSISTANT: Hello, how may I render you?

USER: I need to cancel my recent reservation, as I my health suddenly got upset. Could you help me in cancelling?

ASSISTANT: Sure, we are euphoric to help you in cancellation.

USER: Ok,.

ASSISTANT: Please wait for a while, I will check the reservation list and revert to you.

USER: Ok.

ASSISTANT: Thank you for waiting. We are sorry to inform you that, there is no reservation found with your name.

USER: Ok, no issues. Thanks for your service.

ASSISTANT: Thank you for reaching us. Have a good day.