How to send a reply message to the unpaid guests when the payment is received?

Urge the unpaid guest that the money has arrived, so send a reply message to the guest:

The payment has been received. Thank you for your continuous support to our company.

Our company will, as always, provide quality services.

Thank you for your cooperation.

Short Message Service (SMS) is a part of Unified Communications Service Plan. Users can directly send or receive text or digital information through mobile phones or other telecommunication terminals. The number of characters that users can receive and send short messages at a time is 160 English, numeric characters or 70 Chinese characters. Short message is a telecommunication service in digital mobile communication system. It is a non-real-time and non-voice data communication service to transmit text or digital short messages through the signaling channel and signaling network of mobile communication system.