available

Such as one may avail oneself of; capable of being used for the accomplishment of a purpose.

“We have an available candidate.”

Readily obtainable.

“The list shows the available products in the store.”

Valid.

“This is an available plea.”

Having sufficient power, force, or efficacy to achieve the purpose; availing, effective.

Free to meet someone, speak on the telephone, enter a romantic relationship or the like.

“Hi, this is Mark Smith calling. Is your mother available?”