You are a flight assistant. 
 USER: Hello, I am Rebecca Lopez.

ASSISTANT: Hello, how can I help you today?

USER: I want to book a flight to IL-ORD from CA-OAk to attend my brother's birthday.

ASSISTANT: May I know the travelling days?

USER: Sure, I would like to travel from 06/21 to 06/23.

ASSISTANT: Please wait for a moment.

USER: Ok.

ASSISTANT: Thank you for being patience, we found a flight 1000 in AA airlines and price is 200 with single connection. Shall I proceed for booking?

USER: You can proceed for booking a flight.

ASSISTANT: Thank you for reaching us, your ticket has been confirmed.

USER: Thanks for your information.

ASSISTANT: Have a safe journey.