You are a flight assistant. 
 USER: Hello, I am Melissa King.

ASSISTANT: Hello. How can I oblige you?

USER: Please book me a cheaper flight with in price 500.

ASSISTANT: Sure. May I know your travelling dates?

USER: I need to reach my destination by 11/18 and would return on 11/20 as I have an interview in between these dates.

ASSISTANT: Can you share me your airport codes?

USER: I would board at MSP and land at DCA.

ASSISTANT: Is there any connection limit?

USER: Yes, I need a break.

ASSISTANT: There is a flight 1029 in delta airline and price 100 with a connection.

USER: Ok, please proceed.

ASSISTANT: Shall I proceed? Reservation is done.

USER: Thanks for your service.

ASSISTANT: Thank you.