Use the extra seconds well
In text, you can read a reply, decide what you really mean, and answer at a pace that feels comfortable. That is helpful if you are shy, in a noisy place, or using a device where a call would disturb someone nearby. The slower pace does not mean the conversation must be formal. A small, specific opener usually works better than a demand to be entertaining. Try asking what the other person has been listening to this week or what kind of evening they are having, then follow up on the answer rather than jumping to a second unrelated question.