You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: Can you please help me in flight ticket booking process from DFW to IAD?

ASSISTANT: Sure, let me know your preferred travel dates?

USER: Thank you for your response, I want to take off on Jan 19 and book my return ticket also on Jan 21.

ASSISTANT: Ok, would you like to have any lay off in your journey?

USER: Yes, I need lay off in between my journey.

ASSISTANT: Is there any airline preference?

USER: No.

ASSISTANT: Do you want to travel in business class or economy class?

USER: I am ok with any class.

ASSISTANT: May I know your time preferences?

USER: I am comfortable with any time on that dates.

ASSISTANT: Ok, can you please share your name to proceed further?

USER: Sure, my name is Betty Wilson.

ASSISTANT: Sorry, no flights found as per your request.

USER: That's ok, no problem. Thank you for your information.

ASSISTANT: Thank you for contacting us.