Originally Posted by chinmoylad

It's not a guarantee - I've done it for a few properties, but some places will also stick by their contract.

If it's a property the agent doesn't book regularly, will need negotiating with regional or global sales head (if part of a chain and the chain in general is frequently booked by the agent). If it's a property that's booked regularly by the agent, can negotiate direct with the hotel staff.

Just a hunch, but I think city hotels (vs. very remote properties) would be more willing to offer a change as required due to the plethora of alternate options client can opt for within the city.