Serve is not the same as service, though they are both regular verbs (serve/served/served, service/serviced/serviced).
Serve is the verb of waiters, clerks, and attendants, and it means “to help a customer.”
- The attendant served his customers quickly and efficiently.
Service is the verb of technicians, and it means “to repair or maintain a machine.”
- The mechanic serviced the car before the trip.
If you use the verb “service” in place of “serve,” it is incorrect.
- The waiter serviced his guests <- never, unless the guests are robots.
Service is a noun relating to the ability of waiters, clerks, and attendants to do their jobs.
- The service is great here. I never have to ask them to pour more coffee!