You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I serve you?

USER: I am Alexander Miller. I want to book a ticket to Chicago to meet my friend on his birthday, can you please book a ticket?

ASSISTANT: Sure, can you help me with your journey dates?

USER: Depart date is 06/18 and return date is 06/20.

ASSISTANT: May I know your airport codes?

USER: Airport codes are PHX and ORD.

ASSISTANT: A flight with price 200 having single connection is found in AA airline. Shall I proceed with it?

USER: Proceed.

ASSISTANT: Your ticket is confirmed in flight number 1021.

USER: Thank you.

ASSISTANT: Thank you for reaching us.