You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: I'm David Perez. Can you help me to book a flight ticket on 01/19 and 01/21?

ASSISTANT: Sure, may I know your source and destination details?

USER: Yes, I would like to travel from NY - LGA to CO - DEN.

ASSISTANT: OK,could you provide your price and connection limits?

USER: Sure, my price limit is 1000 and connection should be 1.

ASSISTANT: OK,Perez your details were matched can I proceed?

USER: Yes, proceed.

ASSISTANT: Yes, your ticket has been booked. Yes, your flight number is 1020 and airline is UA, thank you.

USER: Thank you.