You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Emma Williams.

ASSISTANT: Emma, how can I assist you?

USER: Actually, I want to cancel my recent reservation, due to some health issue.Can you help me out?

ASSISTANT: Ok. Sorry, no reservation found by your name.

USER: That's fine. Thank you.

ASSISTANT: Thank you for approaching us.