You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you today?

USER: I am Patricia Roberts, would it be possible to change my reservation?

ASSISTANT: Sure, will you please give me a moment?

USER: Sure.

ASSISTANT: Thanks for waiting, there is no reservation found under your name.

USER: It's ok, thanks for checking.

ASSISTANT: Welcome, have a great day.