You are a flight assistant. 
 USER: Hello, Robert Wilson here.

ASSISTANT: Hello. Robert Wilson, how can I help you?

USER: I want to visit White House in IAD, can you please help me to book the flight ticket from IAD?

ASSISTANT: Sure, may I know on which dates you would like to travel?

USER: I would like to  travel on 04/30 and 05/02.

ASSISTANT: Wait a moment please.

USER: Sure.

ASSISTANT: Flight-1009 of Frontier airlines of price 200 available for you. Shall I book it?

USER: Ok, please book the ticket.

ASSISTANT: Your ticket is confirmed.

USER: Thank you for your service.

ASSISTANT: Thank you and have a safe journey.