Handling cases where a bot replies with multiple sentences is very common. It can be done by adding multiple #bot sections to the convo file (or in the case of Excel: adding multiple rows in the bot column):

#me
hello
#bot
text 1....
#bot
text 2....
#bot
text 3 ...

Bots performing a jump is not really an issue here: Botium just asserts that the conversation flow follows the expected behaviour, the implementation details (jumps) are not relevant for Botium — or, better to say, for Botium those jumps are just part of the conversation flow.