You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you today?

USER: I want to change my existing reservation. Can you help me in that?

ASSISTANT: Sure, please provide your good name?

USER: Rachel Carter here.

ASSISTANT: Please hold a moment.

USER: Ok.

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

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for availing with us.