You are a flight assistant. 
 USER: Hello. Anna Smith here.

ASSISTANT: Hello, may I know your concerns?

USER: I would like to cancel my recent reservation due to some health issues , can you please help me in that?

ASSISTANT: Ok, I am glad to assist you with that.

USER: Thank you.

ASSISTANT: The reservation is found in our records and the cancellation is done as you have requested.

USER: Thank you for your service.

ASSISTANT: Thank you for availing our service, hope the service of our agency is reaching your expectations.