You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Jack Parker.

ASSISTANT: How may I help you?

USER: I am planning to travel to meet my brother in Chicago, can you help me for booking a flight ticket?

ASSISTANT: Ok, can I have your travel dates to get a flight for you?

USER: My travelling dates are 06/20 and 06/22.

ASSISTANT: Fine, let me know your airport codes too.

USER: My travelling airport codes are IAD and ORD.

ASSISTANT: Hold on a moment.

USER: Sure, I will wait.

ASSISTANT: There is a connecting flight-1021 with price 100 of UA airline. Shall I book it?

USER: Ok, please proceed for booking.

ASSISTANT: Ok, your ticket has been done.

USER: Thank you for booking.

ASSISTANT: Thanks for reaching us.

USER: Welcome.