You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I guide you for today?

USER: I am Kathleen Thomas. I am searching a flight to travel to Minneapolis & St. Paul, can you please find a flight from Washington which is an economy class ticket?

ASSISTANT: Can you please share on what dates you are willing to travel?

USER: The planned travel dates are Feb 9th and Feb 11th.

ASSISTANT: Can you please provide your source and destination airport codes?

USER: The source and destination airport codes are DCA and MSP. Sorry,  I need a business class flight.

ASSISTANT: Do you any airline preferences?

USER: No, I didn't have any airlines preference.

ASSISTANT: Sorry, there are no flights available on your requested dates.

USER: It's ok, not a problem with that. Thank you for searching the flights.

ASSISTANT: Thank you for contacting us, have a nice day.