Hi. I am Justin King.
Hello, how may I aid you better?
 I want to do research on a project at NASA space centre at Houston, TX - IAH.
OK.
Can you please hold me a flight ticket from Washington, DC - IAD?
Sure, may I know your travel dates please?
My trip dates are 02/27 - 02/29.
Sorry, no flights are available. Thank you for approaching us.