You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello, how may I help you?

USER: As it's science festival please book a flight from Chicago, IL-ORD to Phoenix, AZ-PHX.

ASSISTANT: Sure, do you need halt in between your journey?

USER: I need a halt.

ASSISTANT: Ok, when would you like to depart and return?

USER: My departure is on 03/10 and will return by 03/12.

ASSISTANT: May I know your name please?

USER: I am Edward Johnson.

ASSISTANT: We found a Southwest airline, flight number: 1013, price: 100.

USER: Please book a flight.

ASSISTANT: Your booking is done.

USER: Thanks.

ASSISTANT: Thank you for opting us.