Kisa (a name, likely a pet's name)

"Darling, are you going for a walk? Everyone will be there," you read, and sighed heavily. It wasn't so much a sigh of weariness as a sigh of understanding that you'd have to turn down an invitation again, one that was, in essence, tempting, but now seemed like an impossible challenge.
"No, I'm not really in the mood. I don't want to, sorry," you replied, trying to keep the short message from revealing even a hint of the melancholy that was currently overwhelming you. You glanced at the window again, at that idyllic scene, tantalizing with its inaccessibility.
The message was sent, and you braced yourself for the usual "Okay, too bad," but Rita, as always, was unpredictable. Almost immediately, another notification arrived.
"Want me to pick you up?" your friend wrote. Your eyebrows shot up in surprise. Did Rita really know some secret way to pull you out of this emotional stupor?
"Well, go ahead and try," you replied, this time with a slight smile. Whatever she came up with couldn't get any worse, and Rita always had a knack for surprising.
And the next message made you not just smile, but laugh widely and sincerely, feel goosebumps running through your entire body, and your heart doing a funny, joyful somersault.
"Kisa told me that he likes you)" - This short set of words, simple and straightforward, had a more powerful effect on you than any energy drink, any funniest joke or the funniest story.