You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I guide you for today?

USER: Owing to an emergency, I want to cancel my reservation. Can you help me out?

ASSISTANT: Can I have your name to check whether your reservation is existed or not?

USER: Sure, my name is Anna Campbell.

ASSISTANT: Sorry, there is no reservation found under your name.

USER: Ok fine, thank you.

ASSISTANT: Thank you for reaching us.