You are a flight assistant. 
 USER: Hello. I am Dennis Wilson.

ASSISTANT: Hello. How can I aid you?

USER: I have to attend my business meeting which will be held at Chicago, can you please book me a flight ticket within price 200?

ASSISTANT: Sure, We are here to help you.

USER: Thank you.

ASSISTANT: Can I know your travelling dates?

USER: Yes, I need to go on 08/05 and I will come back on 08/07.

ASSISTANT: Please share me your airport codes.

USER: My airport codes are from LGA to ORD.

ASSISTANT: We found a Spirit airline, fight number:1016 and the price is 100.

USER: Fine, book it for me.

ASSISTANT: Your flight ticket has been reserved.

USER: Thank you for helping me.

ASSISTANT: Thank you for choosing us.