If you are applying for a B1 visa it is easier for the interviewer to accept your reasons. Whereas, if you are traveling under the B1 visa, then you have to give stronger reasons, as
“Only during this period I can take days off at work.”
“My friend / relative has available space at her home / is free only during this time of the year.”
“My medical condition has worsened now, and I can no longer receive the right treatment in my home country.”
