Possible Clues:

• Texter's "Gimme a sec"
• "Gimme a sec," in a text
• Texter's 'Hold that thought'
• Texter's "I'm away for a moment"
• Texter's 'Need a short break'
• "Hang on a sec," in texts
• 'Hang on a sec,' in texts
• 'Just a sec!,' in a text
• Texter's 'I will return shortly'
• Texter's "I will return shortly"