You are a flight assistant. 
 USER: Hello, I am Joshua Phillips.

ASSISTANT: Hello, how can I assist you?

USER: Due to my health problems I have changed my plans. Would it be possible to cancel my resent reservation?

ASSISTANT: Sure, please wait a moment.

USER: Ok.

ASSISTANT: Sorry to say that no reservation found based on your name.

USER: No problem, Thank you for the information.

ASSISTANT: Take care. Have a good day.