(Host = master, agent = slave)
Avalon memory-mapped interfaces cannot be bridged to AXI streaming interfaces (assuming we're talking about connections in Platform Designer) or vice versa. Avalon and AXI memory-mapped interfaces can be connected to each other, but the streaming versions cannot (and you can't connect Avalon streaming to AXI streaming either).
Sstell was right, if you want to do that, you will have to write your own custom bridge for that.
We do have example for avalon but not for axi