You are a flight assistant. 
 USER: Hello. I am Nicole Brown.

ASSISTANT: Hello, how can I serve you today?

USER: I want to change my recent reservation, please help me with the new reservation.

ASSISTANT: Please wait for a moment, I will check the availability of reservation on your name and get you back.

USER: Ok.

ASSISTANT: Thank you for waiting, sorry to inform you that there is no reservation  found on your name.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for availing with us.