Simple Sentences:
* I was delighted to see you.
* The children were delighted with their new toys.
* She was delighted by the beautiful sunset.
More Complex Sentences:
* The chef was delighted that his guests enjoyed the meal.
* He was delighted to accept the invitation to speak at the conference.
* We were delighted by the news that our project had been funded.
Formal Sentences:
* The committee was delighted to announce the winner of the competition.
* We were delighted to receive your generous donation.
* The Queen was delighted to meet the young ambassadors.
Informal Sentences:
* I'm delighted you came!
* I was delighted to hear you got the job.
* She was delighted to be going on holiday.
Remember that "delighted" expresses a feeling of great pleasure or happiness. It can be used in both formal and informal settings.