You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how can I aid you?

USER: Please book a ticket from Oakland, CA-OAK to Las Vegas, NV-LAS for science festival.

ASSISTANT: Ok, may I know your travel dates?

USER: My travel dates are from 09/10 to 09/12.

ASSISTANT: Do you have any preference?

USER: Price limit is 200. Connections limit is 1.

ASSISTANT:  We found a connecting flight UA with flight number 1003 and fare is 100.

USER: Please book a ticket.

ASSISTANT:  Your booking is confirmed. Thank you.

USER: Thank you.

ASSISTANT: May I know your name?

USER: I am Eric Scott.