I called because we have an appointment today, and I wanted to check the status of the technician; he hasn't arrived. I just wanted to know if you had an idea more or less when he will be here? Do you have no closer time range?

Upon checking here in my system, you have an appointment today between 10am and 1pm. Our technician will give you a call 30 minutes prior to the arrival. The time will be between 10am and 1pm. I don't have a specific time when he should arrive, but it should be between 10am and 1pm.