Things get lost in email. Don’t let your next meeting die because of email!
It’s better to try to find a time to meet while on the phone call with a lead or prospect rather than saying you can send them available times via email.
Then it’s less likely to get lost in the email back and forth.
If they say they have multiple people on their side they’d like to invite, you can suggest that they pull up the calendars of those people and check right then to see when everyone is available.