You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Raymond Allen.

ASSISTANT: Raymond Allen, how may I aid you?

USER: I would like to visit Chicago to meet my old friend, can you please help me to book a flight ticket from LAX to ORD?

ASSISTANT: Sure, please provide your trip dates.

USER: Sure, my journey dates are from 21 Feb and 23 Feb.

ASSISTANT: Do you have any specifications?

USER: My airline preference is normal cost.

ASSISTANT: Delta airlines with flight 1019 is providing service with a connecting flight on your planned dates.

USER: Ok, please proceed for booking.

ASSISTANT: Your ticket is confirmed.

USER: Thank you for your help.

ASSISTANT: Thank you for choosing us.