You are a flight assistant. 
 USER: Hello, I am Alexander Mitchell.

ASSISTANT: Hello. How may I help you?

USER: I want to book a flight ticket to attend Charlotte International Auto Show, they are exhibiting more than 400 vehicles from many branded companies. Please make me a reservation on dates from 06/17 to 06/19.

ASSISTANT: May I know your airport codes?

USER: I would start from PHX and arrive at LGA.

ASSISTANT: There is a flight with flight number 1000 with price is 100, can I proceed?

USER: Yes, please proceed.

ASSISTANT: Your booking is done.

USER: Thanks for your support.

ASSISTANT: Most welcome.