Indicate title without italics or underline

Solution 1:

According to the Associated Press Stylebook, you should use quotation marks around the titles of books, songs, television shows, computer games, poems, lectures, speeches and works of art.

You don't need to use quotations around the names of magazine, newspapers, the Bible or books that are catalogues of reference materials.

None of them are required to be underlined or italicized.

Considering that this is for text messages, there doesn't seem to be a good reason to apply the rules of MLA or Chicago style. Your priority should be to effectively communicate to your reader, regardless of style. That said, Chicago style includes this recommendation:

When composing Web documents, avoid underlining. Instead, use italics for titles, for emphasis, and for words, letters, and numbers referred to as such. When you write with programs such as email that don’t allow italics, type an underscore mark _like this_ before and after text you would otherwise italicize or underline.