You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, may I know how best I can help you today?

USER: Ronald Thomas here. I want to meet my nephew at Chicago, please book my ticket from Washington DC.

ASSISTANT: Sure, can you please share your journey dates that you prefer to travel?

USER: I will be leaving on 01/16 and returning on 01/18.

ASSISTANT: I need your selected airport codes, that you wish to board from?

USER: I will be travelling from IAD to ORD.

ASSISTANT: We are pleased to inform you that we have found a Southwest airline, flight number-1020 connections-1 and price limit is 100.

USER: Please book my ticket.

ASSISTANT: Your booking is done.

USER: Thank you for the help.

ASSISTANT: Your welcome.