Much obliged!

• Reply to gift of tissue during short trip
• Tot's "magic words"
• Say this and you'll be welcomed
• Gift recipient's sentiment
• Polite words
• Must-learn term for a foreign visitor
• Bread-and-butter note's message
• Recipient's reply
• Polite expression

Wiktionary Word definitions in Wiktionary
interj. (alternative spelling of thank you English) n. (alternative spelling of thank-you English)