Clara will try to schedule the call during work hours for both you and your international contacts (unless you specify otherwise). Use a Codeword to expand your preferred meeting times for international timezones that may pose an timing issue.
Please note that Clara will not be able to determine if a participant is "international" from their domain, website, or phone number. You will need to tell Clara the participant's timezone -or- it would need to be somewhere in the thread context already such as a location in their email signature or mentioned in the thread correspondence.
"Clara, please find time for me to chat with Matt (who is in London)."
"Looping in Clara to find a time for this international team to talk."