First make 2 switches: 1st statement and 2nd statement
Now in the first event page, use 1st statement as the conditional switch.
Then, after the guy's finished speaking, turn the switch off.
Then, when the hero's touched a certain tile, (eg: the platform tile where the
player receives his prize) it will set off another switch, s[2nd statement].
Then when that switch's on, the guy will carry on with his speech.
*remember to have a third page with no commands and conditionals at all. Only the charset. Cos' if you put the first switch off, the charset will disappear. You don't want your guy to disappear do you?