The incident happened at around 1pm on Wednesday, 6 June 2018.
The suspect is described as a man, aged approximately 50-years-old, with brown shaven hair. He was wearing a navy blue jumper and tracksuit bottoms at the time of the offence.
In particular, officers would like to speak with anyone who heard offensive comments directed towards a member of staff.
Anyone with information that could assist the investigation should contact North Yorkshire Police on 101, select option 2, and ask for Sheree Evans. You can also email firstname.lastname@example.org
Information can be provided anonymously to the independent charity Crimestoppers on 0800 555 111.
Please quote reference 12180100146 when providing information.