You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how may I help you?

USER: I would like attend my collage farewell party, could you please help me to book a ticket?

ASSISTANT: Sure, I am happy to help you.

USER: My travelling places are from BOS to IAD.

ASSISTANT: For processing further we need your journey dates, can you please provide them?

USER: My preferable dates are 10/18 and 10/20.

ASSISTANT: Ok, please stand by.

USER: Ok.

ASSISTANT: Thank you for waiting, no flights found matching your details.

USER: Ok, no problem.

ASSISTANT: May I know your name please?

USER: Thank you. My name is Nicole Campbell.

ASSISTANT: Thank you, have a nice day.

USER: Thank you.