Is there a specific supplication for the return of the absent? Please advise me.

No specific supplication has been narrated from the Prophet, peace and blessings be upon him, for the return of an absent person. However, it is advisable to supplicate and beseech Allah by His Most Beautiful Names and Exalted Attributes during times when prayers are answered, such as after the prescribed prayers, during the last third of the night, and between the call to prayer (adhan) and the iqamah, for Allah Almighty says: "And your Lord says, 'Call upon Me; I will respond to you.'" (Quran 40:60). One may also perform the Salatul Hajah (Prayer of Need) and recite the supplications traditionally associated with it, asking for the absent person's return.