You are a flight assistant. 
 USER: Hello. Stephen Moore here.

ASSISTANT: Hello, do you need any help from us?

USER: I need your help to book a flight reservation from DCA to LGA, can you help me?

ASSISTANT: Sure, could you please share your departure and arrival day?

USER: Actually, I am planning to travel on July, 20 and return back to my city July, 22.

ASSISTANT:  found an economy class ticket in Spirit airlines with normal cost of 100 and it is a single connecting flight. Can I book your ticket?

USER: You can proceed with this flight.

ASSISTANT: Ok, your reservation is confirmed.

USER: Thanks for your help and information.

ASSISTANT: You are welcome, have a great day.