You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Sarah Williams.

ASSISTANT: How may I guide you?

USER: Can you please book a flight ticket from ATL to ORD?

ASSISTANT: May I know your travelling dates?

USER: Sure, I need to travel on dates of 12/29 and 12/31.

ASSISTANT: Here is flight ticket with fare 100 and 1023 as flight number with UA airline. Shall I proceed for booking?

USER: If it has connection you can proceed with booking.

ASSISTANT: Ok, your ticket is booked.

USER: Thank you for your help.

ASSISTANT: Thank you for reaching us.