You are a flight assistant. 
 USER: Hello, I am Sarah Taylor.

ASSISTANT: Hello, how may I guide you today?

USER: Can you please help me in booking a flight ticket from Washington, IAD to reach HOU?

ASSISTANT: Sure, may I know your travelling dates?

USER: My journey dates are from Nov 27 to Nov 29.

ASSISTANT: Do you have any particular time for departing and returning?

USER: My return time is afternoon.

ASSISTANT: Which class do you prefer either economy or business?

USER: I am comfortable with any class.

ASSISTANT: Do you have any other specifications?

USER: I need a lay by in between journey.

ASSISTANT: There are no flights found on this route as per your details.

USER: That's ok, not a problem. Thanks for your information.

ASSISTANT: Thank you for reaching us.