There are many polite and thoughtful ways to respond to "thank you." The classic and most common response is simply saying "You're welcome." Alternative responses that convey appreciation and warmth include phrases like "I'm glad you like it," "Glad I could help," "It was my pleasure," "Anytime," and "Happy to do this for you." For more casual situations, people often say "No problem," "No worries," "Don't mention it," or "Sure!" If the thanks is more emotional or detailed, responses like "I appreciate you saying that" or "Thank you for your kind words" are also appropriate. The choice of response can depend on the formality of the setting and the relationship between the speakers, ranging from professional options to more casual and friendly expressions. Generally, responding with warmth and sincerity is the key.