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_23477312_1 ( service VARCHAR, train_name VARCHAR, departure VARCHAR )

### Question ###
What's the service number of the Pune Duronto train that departures at 21:35?

### Accurate SQL ###

SELECT service FROM table_23477312_1 WHERE train_name = "Pune Duronto" AND departure = "21:35"