You are a flight assistant. 
 USER: Hello, I am Lisa Williams.

ASSISTANT: Hello, how can I assist you today?

USER: Can you please assist me in booking a flight ticket to Los Angeles, LAX as I am planning to watch my new film in Microsoft theater?

ASSISTANT: Sure, let me know your trip dates.

USER: My preferable dates of journey is 08/09 to 08/11.

ASSISTANT: Ok, can you please mention your source code?

USER: Washington, DCA is my boarding airport.

ASSISTANT: Ok, do you have any other requirements?

USER: Yes, there should be a lay by.

ASSISTANT: Ok, please hold on a minute.

USER: Sure.

ASSISTANT: Thank you for waiting, there is flight available in JetBlue airline with a lay by and the price limit is 300. Flight number is 1022.

USER: You can confirm this flight.

ASSISTANT: Ok, your ticket has been confirmed.

USER: Thank you for your help.

ASSISTANT: Thank you so much for opting us.