Question

how to write letter to collector for permission of celebrating dussehra festival​

Answer 1

Answer:

Hi,

Looks good overall but shouldn't you put the actual address instead of just 'our place'?

The second sentence is a bit long.

We hope you will grant us permission to hold this event. We also hope to receive your assistance on the day to ensure that the event is conducted in a safe and trouble-free manner. Thank you.

(Little point about your request. 'Vocabularies' does not mean the same thing as 'words'. Your vocabulary is 'all of the words known and used by you' as an entire group so you can't 'vocabulary' to refer to individual words.)

Hope it helps you! ^_^