You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you?

USER: I am Laura Collins from Phoenix. I would like to change my recent reservation, can you help me with this?

ASSISTANT: Sure, I am glad to help you in modifying your reservation.

USER: Thank you.

ASSISTANT: Please allow me a moment to check for your previous reservation status.

USER: Sure, take your own time.

ASSISTANT: Sorry Collins, there is no active reservation found under your name in our database to amend it.

USER: That's fine, thanks for your information.

ASSISTANT: Thank you for availing our service.