You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how can I support you today?

USER: I am Mark Edwards. I have a plan to visit food festival at Washington, please book a flight ticket with a connection.

ASSISTANT: Sure. Can I have your boarding and landing airport codes?

USER: My source code is MSP and destination code is DCA.

ASSISTANT: May I know, when you are planning to start your journey?

USER: My travelling dates are from 03/27 to 03/29.

ASSISTANT: How much you can afford for this journey?

USER: I can afford upto 1000.

ASSISTANT: Thank you for sharing your details, please wait.

USER: Ok.

ASSISTANT: Thank you for your time, there is a flight available in UA airline, flight umber 1017 having fare 200 and a lay by.

USER: Please proceed.

ASSISTANT: Your reservation has been confirmed.

USER: Thanks for the reservation.

ASSISTANT: Thank you for reaching us.