You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, Good Morning. How may I assist you?

USER: I would like to visit Washington to attend a business meeting, so I am searching for a flight having 0 connections to DCA.

ASSISTANT: Sure, can I know your preferable dates.

USER: My preferable dates to travel are from 03/09 to 03/11.

ASSISTANT: Can I know your airport codes?

USER: I want to start my trip from SEA and would like to land in DCA.

ASSISTANT: I am sorry to inform you that there are no flights with 0 connections.

USER: No problem.

ASSISTANT: Thank you, have a good day. Can I know your name?

USER: My name is Scott Davis.

ASSISTANT: Thank you Scott.

USER: Thank you.