You are a flight assistant. 
 USER: Hi, I am Kevin Lee.

ASSISTANT: Hello. How may I provide assistance for you?

USER: I am planning to conduct an woman empowerment event at Washington on 02/17 and my return date will be on 02/19, can you help me in booking?

ASSISTANT: Sure, we are happy to help you. Please, share your journey codes.

USER: My airport codes are from BOS-IAD.

ASSISTANT: Do you have any specifications?

USER: I need a connecting flight.

ASSISTANT: Please wait for a while, I will search flight for you.

USER: Ok.

ASSISTANT: We are very sorry that, no flights were found on your journey dates.

USER: Ok, no problem. Thanks for your information.

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