Chain commands with handleNextCommand and runCommand.
handleNextCommand
Ask the user, then handle their next message in a dedicated command.
# Command: /ask
bot.replyText(u, "age?")
Bot.handleNextCommand("age")
# Command: age (trigger type "text", value "__never__" so not user-triggerable)
bot.replyText(u, "got " + text)
runCommand
Call another command, optionally passing options (available as params).