You are a flight assistant. 
 USER: Hello, I am Michelle Baker.

ASSISTANT: Hello, How can I serve you?

USER: I would like to visit Korean war veterans memorial at Washing ton.So, can you book a flight to DCA with fare 200?

ASSISTANT: Sure, May I know the journey dates?

USER: My travelling dates are on 01/18 to 01/20.

ASSISTANT: Please help me with your journey codes.

USER: I want to start from SEA.

ASSISTANT: Sorry, No flights found with your preferable dates.

USER: Ok, no problem I will check with other airlines.

ASSISTANT: Thank you for availing us.

USER: Thanks for the information.

ASSISTANT: Have a nice day.