You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: I am Patricia Nelson, Could you change my reservation?

ASSISTANT: Sure, I am here to help you. Please wait for a while, I will check your previous reservation.

USER: Sure.

ASSISTANT: Thank you for your time. There is no active reservation found on your name.

USER: Ok, thank you.

ASSISTANT: Thank you for contacting us.