You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you for the day?

USER: Can you please help me to book a ticket from BOS to IAD?

ASSISTANT: Sure, I will help you with that. Can you please share your preferable travel dates?

USER: My travelling dates are on Aug 15 and Aug 17.

ASSISTANT: Would you like to travel in a connecting flight or direct flight?

USER: I need a direct flight.

ASSISTANT: Do you have any other specifications?

USER: No.

ASSISTANT: Sorry for the inconvenience, there are no flights found on this route as per your travel dates.

USER: Ok, not a problem.

ASSISTANT: May I know your name please?

USER: Thank you. My name is Debra White.

ASSISTANT: Thank you for reaching us, have a great day.

USER: Welcome.