If you communicate with tour guides, it is best to have tour guides who often order food from your house and find your place better and recommend it to other tour guides
If you have never cooperated with travel agencies and tour guides, you have to take the initiative on your own at first, preferably in the peak season when it is not easy to order food, and recommend your catering to them. I would recommend your restaurant to them, and if we work well together in the future, people will remember your place.