You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: I am Sandra Hall. I want to book a flight ticket to Washington, DCA to meet my grandparents.

ASSISTANT: Ok.

USER: Can you help me in booking a flight ticket under the range of 1000?

ASSISTANT: Sure. When you are planning to travel?

USER: My planned dates are from 11/01 to 11/03.

ASSISTANT: Please, let me know your source code?

USER: I am boarding at New York, LGA.

ASSISTANT: Do you need a lay by in between your journey?

USER: Yes, I need Layover in my journey.

ASSISTANT: Thanks for sharing your details.

USER: Ok.

ASSISTANT: Delta airline flight with single connection having 1003 number is available on your preferable dates. Shall I confirm it with the fare of 200?

USER: Ok, You can confirm.

ASSISTANT: Your ticket has been booked.

USER: Thanks for your kind service.

ASSISTANT: Thank you for opting us.