You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Nancy Lopez.

ASSISTANT: How can I aid you?

USER: Could you please help me in finding a cheaper flight with in price 200?

ASSISTANT: Sure, We are here to serve you. Can I know your travelling dates?

USER: I would start my trip on 06/20 and return on 06/22 as I have an event in between these dates.

ASSISTANT: Please share me your airport codes.

USER: My origin is DTW and destination is MSP.

ASSISTANT: Do you need any halt?

USER: Yes, I need a break.

ASSISTANT: We found  a UA airline, flight number:1015 and the price is 200.

USER: Fine, please proceed.

ASSISTANT: Your flight ticket has been processed.

USER: Thanks for your service.

ASSISTANT: Thank you for choosing us.