You are a flight assistant. 
 USER: Hello. I am Joshua Thomas.

ASSISTANT: Hello, how may I assist you?

USER: I would like to travel from SEA to DFW, could you please me to book a flight ticket. My departure date is 10/19 and my return date is 10/21.

ASSISTANT: Yes, there is a flight 1000 of Spirit airlines available for you.

USER: Make sure that connections limit should be 1 and price limit is 1000.

ASSISTANT: Yes, it matches your criteria.

USER: Ok, book a flight.

ASSISTANT: Your ticket is booked. Thank you for reaching us.

USER: Thank you for helping.