You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how may I help you today?

USER: Can you please help me out in changing my existing reservation?

ASSISTANT: Sure, we are glad to help you.

USER: Thank you.

ASSISTANT: May I have your name please to check the status of your reservation?

USER: I am Kathleen Johnson.

ASSISTANT: Thanks for providing name, please be on hold.

USER: Sure.

ASSISTANT: Thanks for waiting, no active reservation found on the name of Kathleen Johnson.

USER: Ok, no problem.

ASSISTANT: Thank you for reaching us.

USER: Thank you.