Final answer:
To confirm that a guest doesn't want to order anything else, you can ask them 'Is that all?'. This is a polite way to check if the guest has finished ordering.
Step-by-step explanation:
To confirm that a guest doesn't want to order anything else, you can ask them option C) Is that all? This question is a polite way to check if the guest has finished ordering. It allows the guest to let you know if they need anything else or if they are done ordering.
Option A) Are you done ordering now? can also be used, but it may sound slightly more direct. Option B) What else can I get for you today? suggests that there might be additional items the guest would like to order, which may not accurately reflect their intention.
Therefore, the best option to confirm that a guest doesn't want to order anything else is option C) Is that all? To confirm that the guest doesn't want to order anything else, the most appropriate option is to ask, "Is that all?" This question is a clear and concise way to check if the guest has completed their order and if there are no additional items they would like to add.