You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

USER: Can you please help me to change my existing reservation?

ASSISTANT: Sure, please share me your good name.

USER: Sure, I am Nicole Taylor.

ASSISTANT: Please wait for a while.

USER: Ok.

ASSISTANT: Sorry to say that, there is no active reservation found on your good name.

USER: Ok, not an issue. Thank you for checking.

ASSISTANT: Thank you for availing us.