Possible Clues:

• Texter's "Much appreciated!"
• Alternative to the prayer hands emoji
• Text that might get "ur welcome" in response
• 'Ur the best!'
• 'Appreciate it,' for short
• Texting expression of gratitude
• Appreciative letters, online
• Texter's message of appreciation
• Texter's "I appreciate it"
• 'Much appreciated,' in a text message