Notify users that they don't have a match

[thechutrain]

Summary

Users who are trying to get matched on a day where they are the only one trying to find a coffee chat should have receive a message saying that they don't have any matches for today.

Basic example

User "A" is the only user signed up for coffee chat on Sunday.

User "A" should get a message on Sunday that they were the only user signed up for today so we could not find them a coffee chat :(

Motivation

The motivation for this is so users don't assume that there is bug in the days they are set to meet on