You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist now?

USER: I am looking for a flight from BOS to IAD, can you help me out?

ASSISTANT: Sure, I am glad to help you with that. Can you please provide your preferable dates of travelling?

USER: My trip dates are from Mar 27th till Mar 29th.

ASSISTANT: May I know your name to book a flight ticket?

USER: Myself Kenneth Baker.

ASSISTANT: Do you have any connection limit?

USER: I am looking for a connecting flight.

ASSISTANT: Any other concerns do you have?

USER: I would like to return in morning session only.

ASSISTANT: Please wait a moment to check the flights.

USER: Ok.

ASSISTANT: We are apologize that, there are no flights running towards your region with your requested preferences.

USER: That's ok, not an issue. Thank you for you information.

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