Make a fake Telegram chat online
Open this page and the chat is already in the Telegram style: a soft green-grey background, a blue header, white bubbles for the other person and pale green ones for you. Rename the two people and rewrite the messages, and the preview follows every keystroke.
There is nothing to install and no account for the image: write the chat, press Download image and you get the whole conversation in one PNG with no watermark. The header shows a circle with the contact’s first letter and their name, so Admin, Dad or a nickname all work.