I just wanted to know if it is possible for me to change Mycroft’s responses to specific questions.
You can do this in a few ways.
If you know a specific phrase that you want to respond to, you can create your own Skill with a very specific match on the utterance in a Padatious
.intent file. This should trigger prior to a less specific utterance match. The intro to Skill development pages would be a good place to start.
Alternatively you can look at what Skill is handling the utterances you want to change and edit those Skills directly. Either just on your own machine, or by forking their repositories if you want to do this across multiple devices.