[Voice]
[He doesn't want to admit to being worried, but he is relieved at that response.]
Keep your communicator on, Winry. If you're in trouble call me... Be careful, okay?
And let me know when you get in.
[With all the careless risks Al and Fletcher were taking after he arrived he doesn't want to leave anyone's safety up to chance. He still hasn't gotten over Al spending the night in a bottomless pit.]