You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I guide you today?

USER: Unfortunately, I would like to cancel my reservation which is done recently due to some health issues, can you please help me in this intent?

ASSISTANT: Sure, I will help you with that.

USER: Thank you.

ASSISTANT: Please wait for a minute. May I know your name please?

USER: Sure, take your time. Sure, my name is Joseph Collins.

ASSISTANT: I am sorry to say that there is no reservation found.

USER: That's ok, thank you for your service.

ASSISTANT: Thank you for contacting us.