You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. In which way I can help you at this moment?

USER: Could you help me in booking a flight ticket from IAD to BOS?

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

USER: I want to fly on Jan 23, return on Jan 25.

ASSISTANT: May I know your name for further process?

USER: My name is Jerry Hernandez.

ASSISTANT: Do you have any another specifications?

USER: My depart time should be afternoon.

ASSISTANT: Ok, please hold on a moment.

USER: Sure, I need a connecting flight.

ASSISTANT: Ok. Sorry, no flights are available in this route as per your requested dates.

USER: Not an issue, thank you.

ASSISTANT: Thank you for reaching us.