I work for an independent opticians and deal with eyewear sales reps as part of my job. One such rep rang today to book an appointment to show me his company's new range. Now I've never met or spoken to him before so listened to his spiel and agreed to see him. Firstly I asked him to remind me of his name to which he replied 'Richard but you can call me Dick' then said 'Okay I've got my diary, when can I do you?' followed by a laugh. At this point I told him that I thought he was being completely unprofessional and inappropriate and told him to forget it and hung up. I rang my manager who is also male and told him what had happened and basically got told 'oh you know what sales reps are like, it's only a bit of banter'! Am I being unreasonable in wanting to put in a complaint to his company or is my manager right it's just a bit of banter?