RegEx - remove text from listing...?

Question

linux

have text:
[phone] Last name first name
here text from Last name first name
here text from Last name first name
here text from Last name first name
[phone] first name55 last name55
text 1 wrote first name55 last name55
text 1 wrote first name55 last name55
text 1 wrote name55 surname55
[phone] Nick
here user wrote Nick
here user wrote Nick
[phone] First name Last name
and here First name Last name wrote
and here First name Last name wrote
[phone] SuperNick
Super Nick too wrote
[phone] Nikkkkk
well and nikkkkk
[phone] first name55 last name55
text 2 wrote first name55 last name55
text 2 wrote first name55 last name55
[phone] First name Last name
here text 2 from Last name first name
here text 2 from Last name first name
here text 2 from Last name first name
[phone] SomeoneFromChat about
20 minutes ago something with wires
+ 7 999 888-22-11 First name Last name TraLa lal
lal
[phone]
SomeoneFromChat here FirstnameLastname again wrote 4 how to delete all messages from the user "[phone]" using a regular expression?

Using a regular expression is planned in sed (linux, bash)

PS all matches with real phone numbers are random and the names are fictitious. If the number, first name or last name belongs to you, please contact, the text will be changed

Answer 1

It’s quite simple with a regular expression
(\[phone][\s\S]+?)(?=\n\+\d+ \d{3})
https://regex101.com/r/KlccLI/1/
But sed has its own dialect, in fact it’s not just a regular expression, you can write your own scripts there. And I still haven't mastered their syntax (.

Answer 2

It's elementary.
sed '/awk/d' filename.txt

Answer 3

This is a task, not a question. Smoke seda manuals, check at regex101.com.