You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

USER: I want to make some slight changes with my existing reservation, can you help me?

ASSISTANT: Sure, please provide me the name to check for the status.

USER: Myself Karen Williams.

ASSISTANT: Please be on hold.

USER: Sure, I will wait.

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

USER: That's not an issue, anyway thank you for checking.

ASSISTANT: Thank you for reaching us.