You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you today?

USER: I would like to change my existing reservation, can you help me in that?

ASSISTANT: Sure, please share your good name.

USER: Sure, myself Kathleen Jones.

ASSISTANT: Please stand by.

USER: Sure, I will wait for your response.

ASSISTANT: Thank you for waiting, there is no active reservation found with the given name.

USER: That's ok, no problem. Thank you for the information.

ASSISTANT: Thank you.