Mohammad Tahir, 44, of Stratford Road, Luton, pleaded guilty to inciting a child to engage in activity and today (Friday) was handed a 13-month prison sentence.
The incident occurred in August 2018 when Tahir was working in a fast food shop in Shefford, which was a popular hangout for teenagers.
He would regularly buy alcohol and cigarettes for the victim and exchanged text messages with her. On this occasion they agreed to meet that evening so he could take her to a local supermarket to buy alcohol.
After the incident, Tahir continued to send messages to the girl, which her father found on her phone, and which led her to disclosing what had happened.
Tahir was subsequently arrested and charged with inciting a child to engage in illicit activity.
He will also be the subject of a 10-year Harm Prevention Order on his release from prison.
Detective Constable Allan Taylor, from the Child and Vulnerable Adult Abuse team, said: “There is no doubt that Tahir groomed this young girl by buying her cigarettes and alcohol, and then callously took advantage of her in the worst possible way.