You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: My name is Nancy Roberts. I would like to meet my uncle at Chicago, please book a ticket from IAD to ORD.

ASSISTANT: Sure, may I know your trip dates please?

USER: My trip dates are 12/20 and 12/22.

ASSISTANT: There is a flight which can travel to your region having a single lay out in between your journey having a ticket fare of 100 which is provided by Delta airlines. Would you like to book this flight for your journey?

USER: Ok, please proceed for booking.

ASSISTANT: Ok, your ticket is booked.

USER: Thank you for your assistance.

ASSISTANT: Most welcome.