Leads rarely give their consent at the first contact:

The lead conversion peak is on 5th-7th touch. If a lead hasn't agreed to a meeting in 10 touches, he'll probably never agree to a meeting.

Growing hot leads is many times more efficient than a single contact. Organize a series of 10 touches. Take a pause of a few days between touches.

Read the full article "10-touches to growing up hot leads".