You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I best serve you now?

USER: I need to cancel my ticket due to my health issue, can you help me?

ASSISTANT: Sure, I can cancel your reservation right now. Before that I need to know your good name please?

USER: I am Catherine Perez.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: We are sorry to say that, there is no active reservation found on your name.

USER: That's ok. Thank you for your service.

ASSISTANT: Thanks for approaching us, wish you a nice day.