Hello.
Hello, how may I aid you today from my end?
I want to book a direct flight to Washington, IAD to go for Music festival. Can you please help me for booking?
Sure, I am here to help you out. Please provide me your trip dates.
My travelling dates are Apr 13 and Apr 15.
May I know your requirement?
I prefer normal-cost airline.
Can you provide me your source airport code?
My source is Houston, HOU.
May I know your respected name?
Sure, I am Steven Nelson.
Sorry  Steven Nelson, there is no flight in your route.
Ok, Thank you for your service.
Thank you for reaching us.