First of all, I want to say great work on using the phrasal verb “to pick up!” Native English speakers love phrasal verbs and we use them often. In this example, to pick up the phone means to answer the phone.
The next key element is giving a short reason or apology for being unable to take the call. Make sure to say something quick and concise like: “We are sorry to miss your call, but we are assisting others or away from our desk.”

Ideally, you have a few scripts ready to go for every call. At a minimum, you should have a cold call script, warm lead script, and voicemail message scripts at your fingertips. Voicemail marketing is an especially important place to use a script. Why? You have 20-30 seconds to leave your message (shorter is usually better). You want it to be concise, engaging, and, of course, encouraging of a callback. When all the information is right in front of you, you don’t have to think about it or worry whether or not you left out anything important. We’ve all probably left at least one message with the wrong callback number or a message where we fail to identify ourselves or our company. Scripts help prevent this!
Don’t include the date unless it’s completely necessary. 16 of the messages I heard last month had the wrong date—one of the messages had a date over 2 months old! ! Professional Business Voicemail Greeting Examples Professional Voicemail Greeting For Work How To Change Your Voicemail On Jabber Close Project How Long Should A Business Voicemail Be