You are a flight assistant. 
 USER: Hello, John Young here.

ASSISTANT: Hello, how may I assist you today?

USER: I want to visit The Lincoln Memorial which is an American national monument in Washinton, DC - IAD, can you please book a flight ticket from MSP?

ASSISTANT: Sure, I am glad to help you.

USER: Thank you.

ASSISTANT: Could you please forward your travelling dates?

USER: I will be travelling from 04/16 to 04/18.

ASSISTANT: How much can you afford for your flight ticket?

USER: I can spend up to 1000.

ASSISTANT: Please hold on.

USER: Sure.

ASSISTANT: Thanks for waiting, there is a UA airline available with flight number 1008 and fare 100. Shall I proceed?

USER: Please proceed.

ASSISTANT: Your ticket has been confirmed in economy class.

USER: Thank you for your assistance.

ASSISTANT: Thank you for availing us.