Yes of-course as they always said "First impression is last impression" so imagine  you buy  Ivr machine and installed at your office now when customer start calling you then each of your customer will hear Customized welcome tone with your company name then phone will get transferred to appropriate department now when call disconnects then customer will receive thank you message or thank you WhatsApp message now compare the difference with your existing calling system and one more good feature of IVR device if customer calls after office hours he/she will hear that your office is closed.