You are a flight assistant. 
 USER: Hello, Sandra Lee here.

ASSISTANT: Hello, do you need any help from us?

USER: I want to change my reservation, can you help me?

ASSISTANT: Sure, please wait for a while.

USER: Ok, please check my booking status.

ASSISTANT: Lee, there is no reservation with your name to change.

USER: Oh! That's fine, thank you for checking anyways.

ASSISTANT: That's ok, thank you for the information.

USER: Most welcome.