Hello, how are you?
Yes, you are interested in renting the house i have posted?
I am! I saw there are no pets allowed, and that is going to be kinda hard on my family. Are you willing to negotiate the price or that rule?
I can negotiate on the pets rule with a pet deposit of $400.00 up front. If you can agree to that I am willing to hear what you would like to offer on price.
I can do that. I'd like to go down closer to $2500?
I can do $2600 if that sounds fair to you. 
That sounds great!
Great! sounds like a deal!