April 13 (Reuters) - Infosys'
* Exec says strong need to make automation and productivity improvements
* Exec says environment is challenging, guidance low based on Q4 performance
* Exec says continue to be positive on financial services
* Exec says expect some of the discretionary spends to come back later in the year
* Exec says expect retail business to be soft or volatile in the coming year Further company coverage: (Reporting By Sankalp Phartiyal)