Read the information about reported statements.
When we report statements, we use say or tell. Also we change pronouns, possessive adjectives and tenses.

Study the table.
Direct speechReported speech
Present SimplePast Simple
Present ProgressivePast Progressive
Past SimplePast Perfect Simple
Present Perfect SimplePast Perfect Simple
Past Perfect SimplePast Perfect Simple
Past ProgressivePast Perfect Progressive
Present Perfect ProgressivePast Perfect Progressive
Past Perfect ProgressivePast Perfect Progressive
Future I (going to)was/were going to
Future II (will)Conditional I (would)
Conditional I (would)Conditional I (would)

“ I want to go on holiday”, Mary said
Mary said (that) she wanted to go on holiday. (present simple - past simple)
“We visited many castles last year”, Mary said.
Mary said (that) they had visited many castles the year before. (past simple - past perfect)
“I will send you some cards”, Kate said.
Kate said (that) she would send them some cards. (future simple - would + V1)
Remember these changes with words.
Direct Speech                      
Reported Speech                   
tonight, today, this week/month/yearthat night, that day, that week/month/year
nowthen, at that time, at once
yesterday, last night/week/month/yearthe day before/the previous day, the previous night/week/month/year
tomorrow, next week/month/yearthe day after/the following day/week/month/year
two days/months/years agotwo days/months/years before
this, thesethat, those/the/some