You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I be your helping hand today?

USER: I am Laura Allen. I want to change an existing reservation, so please help me in changing the reservation.

ASSISTANT: Sure, we are here to help you to change it. Please wait for a while.

USER: Ok.

ASSISTANT: Thanks for waiting, there was no reservation found on your name to change it.

USER: Not an issue. Thank you.

ASSISTANT: Thank you for availing us.