You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Benjamin Martin here.

ASSISTANT: How may I assist you?

USER: Can you please check for the flights on the route from BOS to IAD?

ASSISTANT: Yes, can you tell me your dates of travel?

USER: My journey dates are from Nov 23 to Nov 25.

ASSISTANT: Do you have any other specifications?

USER: My return time is in afternoon and I need a direct flight with economy class.

ASSISTANT: Give me a moment, I will get back to you.

USER: Take your time.

ASSISTANT: Sorry to inform you that there are no flights found on your requested dates.

USER: Oh! That's sad to know. Anyways, thank you for checking.

ASSISTANT: Thank you for contacting us.

USER: Most welcome.