You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how can I help you?

USER: I am Paul Wright, I want to change reservation.

ASSISTANT: Sure, I will help you to change your reservation. Please hold on.

USER: Okay, thank you.

ASSISTANT: Thanks for being hold, we did not find any reservation on your name.

USER: Ok, not a problem. Thank you for helping with details.

ASSISTANT: Thank you for choosing us.