You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: I want to cancel my recent reservation due to health issues, can you please help me with that?

ASSISTANT: Sure. Tell me your name please?

USER: My name is David King.

ASSISTANT: Thanks for your time. I have found your flight reservation and cancelled it.

USER: Thank you.

ASSISTANT: Thank you.