I agree with the two other posters and would like to caution you from always using correct grammar for dialogue. When people are talking out loud, they don't use it.
Off the top of my head, this is an example:
"Something I said?" he asked.
"Every time, another complaint," she said.
"Try living with yourself sometime," he said.
"Comm Ave," she said. "There."
"What?" he asked.
"Comm Ave, where I lived with myself and loved it. Absolutely."
If you're at a restaurant or coffee shop, try recording two people nearby talking to each other. Just for a brief bit. Then take dictation - write down exactly what each one says to the other from the recording. It will inform your writing.