You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello,. How can I amend you today?

USER: I am Lisa Taylor. I want to change my reservation,can you help me?

ASSISTANT: Sure, I am glad to help you. Please, wait a minute.

USER: Sure.

ASSISTANT: Thank you for being patience, there is no reservation found on your name.

USER: Ok, thank you for informing me.

ASSISTANT: Thank you for reaching us.