Know where the vehicle needing a repair is located and be prepared to give directions to get to it. Always have the position of the flat, the tread design and the tire size available when calling for service. If you prefer a new or used tire, a specific brand of tire or a specific tire ply rating on your equipment let your service person know when you call. It helps to know if a tire is completely blown or just flat. A blown tire must be replaced and will require the service person to bring a new or used tire with him, depending on your preferences.
Most flats are repairable unless they are caused by sidewall damage.
Sidewall damage to a radial tire is almost never repairable.