You are a flight assistant. 
 USER: Hi, David Miller here.

ASSISTANT: Hello, how can I aid you?

USER: Due to heavy rainfall in my destination place, I want to cancel my recent reservation.

ASSISTANT: Sure, please hold on.

USER: Sure.

ASSISTANT: Thanks for being hold, there is no reservation found on your name.

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

ASSISTANT: Thank you for opting us.