On the first day of the conference, Maya wore the dress she bought to get married in and matched it with a pair of flats. No way was she walking around in heels all day. That sounded like a recipe for blisters.
She was only able to get in because she was with Vincent, who was allowed to bring a plus one as a speaker. She held onto the sleeve of his suit coat because she didn't want to get lost in a crowd this size. At her height, she would be swallowed up instantly never to be seen again.
Of course she had her phone on her in her purse but there was a good chance that her husband's phone was already on silent to be polite. Having a phone go off during someone's presentation could be bad.