TY for being flexible and letting me reschedule our appointment.
|TYVM||Thank you very much|
|TYM||Thank you much|
|T4LMK||Thanks for letting me know|
In most contexts, TY stands for "thank you." This gracious acronym is the most common way that chatters, texters, and online forum users say "thanks."
Those well-versed in chat slang may also use thx, TQ, or TYVM to thank you. If you want to succinctly acknowledge someone else's TY, you can respond with YW, UW, URW, or YVW.