You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: I want to attend a Marriage in Washington. Can you please help me for booking the flight ticket?

ASSISTANT: Sure, we are here to help you. Can you share me your travelling dates to book a flight ticket?

USER: Thanks. My travelling dates are Dec 08 and Dec 10.

ASSISTANT: May I know your source point and destination point?

USER: My airport codes are BOS and DCA.

ASSISTANT: Do you have any other specifications?

USER: I need a nonstop flight.

ASSISTANT: Let me know your name?

USER: My name is Amanda Thomas.

ASSISTANT: Ok, wait for some time.

USER: Ok.

ASSISTANT: Thanks for waiting there are no flights found on your details.

USER: Anyway, thanks for the information.

ASSISTANT: Thanks for approaching us.