You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I want to amend my reservation. Can you please help me in this?

ASSISTANT: Sure, can you provide me your name?

USER: Myself Lisa Evans.

ASSISTANT: Give me a moment.

USER: Ok.

ASSISTANT: Lisa Evans, I regret to inform that there is no reservation by your name.

USER: It's ok, thank you for searching.

ASSISTANT: Thank you for reaching us.