You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I need to cancel my reservation due to some health issues, can you help me in doing that?

ASSISTANT: Sure, we are here to help you. May I know your name please?

USER: I am Mark Garcia.

ASSISTANT: Sorry to inform you that there is no active reservation on your given name.

USER: Ok, no issues. Thank you for the information.

ASSISTANT: Thank you for contacting us.