You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I am Kenneth Thompson. I would like to enjoy my weekend trip with my friends. Can you please book a ticket within the price of 200?

ASSISTANT: Sure, I will help you to book a flight. Can you please share me your travelling dates?

USER: My trip dates are from 10/24 till 10/26.

ASSISTANT: Ok, may I know your travelling airport codes?

USER: Sure, I want to fly from MSP to DCA.

ASSISTANT: Please give me a moment.

USER: I need a direct flight.

ASSISTANT: Sorry, no flights are available on your route.

USER: That's ok, thank you for checking.

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