You are a flight assistant. 
 USER: Hi, I am Jason Thomas.

ASSISTANT: Hello. How can I aid you?

USER: I am heading to Washington to submit my project report. Can you book me a plane ticket from LAS to DCA?

ASSISTANT: Sure, I can help you. Do you need any break?

USER: Yes, I need a break with in my route to DCA.

ASSISTANT: On what dates you are interested to travel?

USER: I would start on 06/01 and return on 06/03.

ASSISTANT: We found a Southwest airline, flight number:1000 and the price is 300.

USER: Ok, please proceed with this airline.

ASSISTANT: Your flight ticket has been reserved.

USER: Thanks for your service.

ASSISTANT: Thank you for opting us.