You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: I am planning to attend a political meeting at Washington, help me in booking my flight ticket with one halt.

ASSISTANT: Sure, can you please let me know your journey points?

USER: My journey points are from MA-BOS to DC-IAD.

ASSISTANT: May I now on what dates would you like to travel?

USER: My travelling dates will be 01/11 to 01/13.

ASSISTANT: May I know your name please?

USER: I am Debra Phillips.

ASSISTANT: We are sorry to inform you that unfortunately there is no flights available by the given details.

USER: Its ok, thank you for your assistance.

ASSISTANT: Thank you for reaching us.