You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

USER: My name is Laura Lee. I want to do some changes in my existing reservation. Can you help me for that?

ASSISTANT: Sure, please allow me a moment to check for the status.

USER: Sure, I will wait for your response.

ASSISTANT: Thank you for waiting. Here, there is no active reservation have been found under your name in our database to amend it.

USER: That's ok, thank you for checking.

ASSISTANT: Thank you for reaching us.

USER: Welcome.