Definition: In this task, you are given a Reddit post as a text. Your task is to generate a title for this text. The title should start with "TIFU by", followed by a situation that caused humor. The title should contain 7-12 words, ideally.
Input: Text: so... this just happened at my local starbucks. after casually finishing my medium roast coffee i approached the counter to get my refill. in front of me was an african american, lets call him bryan, who was talking with the barista, lets call her beatrice, to order his coffee as well as purchase the metal coffee mug. beatrice was doing her best to sell the metal coffee mug and pointed out that with every purchase with the coffee mug would give bryan a $0.10 discount on the coffee and the refills would be $0.50. afterwards beatrice pointed me out because i was getting a refill on my 16oz medium roast and asked "i don't know your name". i replied in a jokingly manner "it's okay. i don't know yours either." i feel like a huge cock right now.

TIFU by refilling my coffee at starbucks