You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: Myself Nicholas White. Can you help me to book a flight ticket from NY - LGA to AZ - PHX?

ASSISTANT: Sure, I am here to happy you out. Please provide me your trip dates.

USER: Ok, my travel dates are 12/31 and 01/02 respectively.

ASSISTANT: Here is a flight with 1 stop over and price is 300 in Spirit airlines, can I proceed with it?

USER: Ok, my needs are the same. But there is a small change I need a flight with the price limit 200. Can you help?

ASSISTANT: Sorry White, there is no flight with your budget in our airlines.

USER: Not a problem. Thank you for assisting.

ASSISTANT: Thank you for reaching us.