Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_4243 ( "Train number" real, "Train name" text, "Origin" text, "Destination" text, "Service" text, "Route/Via." text )

### Question ###
What is the train number for the train name island express with a destination of kanniyakumari?

### Accurate SQL ###

SELECT "Train number" FROM table_4243 WHERE "Train name" = 'Island Express' AND "Destination" = 'Kanniyakumari'