You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: I am Mary Campbell here, I would like to travel for a weekend party, can you please help me to book a ticket from DTW to ORD?

ASSISTANT: Sure, please share your travel dates.

USER: Ok, my preferable dates of journey is from 04/08 to 04/10. Please make sure that the price limit is 500.

ASSISTANT: The flight 1013 of Spirit airlines is available on your requested dates with a price of 700. Sorry, there is no flight available with a price of 500.

USER: Ok, no problem.

ASSISTANT: Thank you for reaching us.

USER: Thank you for your service.

ASSISTANT: You are welcome.