How to make a regular expression for parsing requests from mail to a Google spreadsheet?

Question

Regular Expressions

Citizens! Help solve the problem. I need to parse applications from forms from the body of the letter. I suspect that this is done by regular expressions. BUT all manuals give simple examples where you need to pull data from a short string with a different character type. And what if I have such a story:
Name: Elena
Phone: [phone]
Mail: [email protected] That

is, I need an expression for each line that would take one type. For example - pick up from Name: to Phone:
And it is not clear in this case how to pick up at the end of the line.