You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

USER: I need a direct flight to LAX for attending a meeting over there. Can you help me in booking a flight ticket?

ASSISTANT: Sure, I can do that for you. May I know your name?

USER: Thank you, my name is Jason Hill.

ASSISTANT: Thank you. Could you please help me with your travel dates?

USER: Sure, my travel dates are May 21 and May 23.

ASSISTANT: May I know your source airport code?

USER: My source airport code is IAD.

ASSISTANT: Thank you. Do you have any class preference?

USER: I am comfortable with any of the class.

ASSISTANT: Ok, please be on hold for a while.

USER: Ok.

ASSISTANT: Flight-1010 is available in Delta airlines having single connection and the ticket fare is 200 only. Flight departs at 12:00 hours and arrives at 5:00 hours. Can I book the ticket for you?

USER: I have mentioned that I need a direct flight for my journey, please search accordingly.

ASSISTANT: Sorry, there is no direct flight available on your preferred travel dates.

USER: It's ok, anyways thank you for the information.

ASSISTANT: You are welcome and have a nice day.