responsive
adjective
[ rɪˈspɒnsɪv ]
• reacting quickly and positively.
• "a flexible service that is responsive to changing social patterns"
Similar:
quick to react,
reactive,
receptive,
open to suggestions,
amenable,
flexible,
accessible,
approachable,
forthcoming,
sensitive,
perceptive,
sympathetic,
well disposed,
susceptible,
impressionable,
open,
alive,
awake,
aware,
• in response; answering.
• "I'm distracted by a nibble on my line: I jig it several times, but there is no responsive tug"