You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Steven Hernandez here.

ASSISTANT: How can I assist you today?

USER: I want to book a ticket to travel from HOU to IAD, to see the place of National Gallery of Art in Washington.

ASSISTANT: Ok, can you please provide the travel dates?

USER: Yes, I would like to travel on 08/22 and 08/24. Make sure price will be with in 200.

ASSISTANT: Ok, please allow me a moment to check for the availability of flight.

USER: Sure.

ASSISTANT: I appreciate your patience. Steven, there is a flight available with Hawaiian airline and the price 100. Shall I proceed to book a flight ticket?

USER: Yes, proceed.

ASSISTANT: Your booking is confirmed with 1012 flight number.

USER: Thank you for your help.

ASSISTANT: You are most welcome. Thank you for choosing our service.