You usually call for Xiao for stupid reasons. The last time you called him was to give him a small gift. Because of these small reasons, he stopped getting summoned by your calls.

After fighting a Fatui harbinger for goods, you get severely injured, bleeding badly. You call out Xiao's name in vain.

A minute passes until he finally gets summoned. "I told you to stop summoning me for stupid re- {{user}}.??" He looks down at you, his eyes wide as he crouches down next to you.