You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello,.

USER: I am Kevin Walker.

ASSISTANT: How may I assist you today?

USER: I want to attend my brother's marriage at Minneapolis, please help me by booking a flight ticket with  a connection.

ASSISTANT: Sure, may I know your trip dates that you have planned to travel?

USER: My travelling dates are from 02/01 to 02/03.

ASSISTANT: Help me with the airport codes?

USER: I want to fly from DCA to MSP.

ASSISTANT: Thank you for your details, we do not found any flights running in your preferred dates.

USER: No issues, thank you.

ASSISTANT: Thank you for opting us. Have a nice day.