In one embodiment, a method includes receiving a user input from a client system associated with a first user, wherein the user input comprises an incomplete gesture performed by the first user, calculating one or more confidence scores by an intent-understanding module for one or more intents corresponding to the incomplete gesture, determining the calculated confidence scores associated with each of the intents are below a threshold score, selecting candidate gestures from a plurality of pre-defined gestures based on a personalized gesture-recognition model responsive to determining that the calculated confidence scores for each of the intents are below the threshold score, wherein each of the candidate gestures is associated with a confidence score representing a likelihood the first user intended to input the respective candidate gesture, and sending instructions for presenting one or more suggested inputs corresponding to one or more of the candidate gestures to the client system.