You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: Due to bad weather at my source, I want to cancel my recent reservation. Can you please cancel my reservation?

ASSISTANT: Ok, may I know your good name?

USER: Sure, please check the reservation on the name of William King.

ASSISTANT:  Please wait I will revert you in a moment.

USER: Sure, I will wait.

ASSISTANT:  Sorry to inform you that no reservation was found on your name in our data base.

USER: Ok, Thank you for your service.

ASSISTANT:  Thank you for availing us.