Honest question, if I have to ask for 3 pieces of information, would it help if I sent it in 3 messages?
Message 1: how many people are coming to dinner?
Message 2: are any vegetarian?
Message 3: what time are they arriving?
Personally I would prefer the 1 message with 3 questions vs the 3 messages with 1 question each(many messages in short time make me think something is wrong and urgent), what's your preference?