First of all I need to give you the answers to yesterday’s exercise with filling in the blanks. I bet you understood these and managed to fill in the right answer, but if you feel the need to brush up on this a bit more there are plenty of exercises on the internet or contact me directly at www.greatlittlebritain.com for more advise. 

1. ….. I’m in a meeting. 
2. …. I’m at work.
3. ….the price of five bananas.
4. If you can come by the office…. 

And now, the importance of giving overly complicated phrases a wide berth and keeping your language as natural as possible. 

Don't try to use words that are too complicated or phrases that are too long-winded, if you wouldn't normally talk like that. 

If your normal vocabulary doesn't normally include for instance "ancillary" in your own language, then don't try to use it in English either. Maybe use "extra" instead if this feels more natural. 

It will just be difficult to keep that facade up at all times and desperately trying to avoid slipping up. 

Better to be natural and genuine, but follow professional protocol and don't get too personal.  

Obviously it will be impossible not to use specific business phrases that aren't part of your day to day speech, but I'm referring to the “padding”, your connective words, the body of a text or general words to bind the business phrases together in a natural and authentic way.