Without any other data or parameters, all that can be said is that the probability is somewhere between 1 (certainty) and 0 (impossibility).
Let's say one of them is an agoraphobic -- never leaves the house. The other refuses to travel further than 290 miles from home. Probability of meeting: Zero.
On the other hand, let's say that they both belong to a Kiwanis Club chapter that meets in a city that lies half-way between them. Probability of meeting: Near certainty.
John
My calculator said it, I believe it, that settles it
