Call arrival. Customer stated there was an odor coming from the basement and guest bathroom upstairs. I looked in basement Saul customer had a sewage ejection pump, inform customer that smell could be coming from there due to the lid not being sealed all the way. I could not see any reason why the smell would have been coming from the guest bathroom. I informed the customer when we are not able to see why they are having issues with the sewer smell that we have to do a smoke test to see where the leak is coming from. Gave customer estimate to do a smoke test. Customer did not approve the estimate. Customer stated that it happened randomly and that she would give us a call if it continues to happen or get worse.