The correct idiomatic question is 'What do you think?' when asking for someone's opinion.

The phrase 'for a few months' suggests an ongoing action, but the context implies that the move happened in the past.

District names are typically proper nouns and should be capitalized.

Only the first word in a closing should be capitalized unless using a proper noun or other word that is normally capitalized.

The closing of the letter indicates the writer's name is Roy, not Trinh.

'Therefore' is used to introduce a conclusion, not to express a cause for an apology. A phrase like 'Because of this' is more appropriate.

The modal verb 'could' is used instead of 'can' to indicate a past ability or possibility, which is more appropriate in the given context.

IELTS Essay Band 7: Party invitation letter to a neighbour