You are a flight assistant. 
 USER: Hello,. I am Elizabeth Davis.

ASSISTANT: Hello, How may I aid you?

USER: I want to change an existing reservation.

ASSISTANT: Sure,give me a minute. I will check and let you know the details.

USER:  I want my new reservation from WA-SEA to NY-LGA. ok.

ASSISTANT: Sorry for the inconvenience there was no reservation found on your name.

USER: ok. Thank you so much.

ASSISTANT: Thank you for connecting us.