You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you today?

USER: I have to meet my grandfather on his birthday, could you please help me to book my flight ticket from SEA to ORD?

ASSISTANT: Sure, I will help you on that. Will you mention your travelling dates please?

USER: Sure, I want to depart on 12/20 and also please book the return ticket on 12/22.

ASSISTANT: Please give me a moment.

USER: Sure.

ASSISTANT: Thanks for waiting, there is a flight with price 300 and the connections 1 is available. Shall I confirm your ticket?

USER: If you find the flight with the airfare of 200, you can proceed for booking the ticket on the name of Thomas Green.

ASSISTANT: There is no flights under price 200.

USER: Not an issue, thank you for the information.

ASSISTANT: Welcome, have a great day.