About my colleague's resignation

Suddenly,my colleague,Mdm Yeo from administration clerk told me that one of my colleague,Mdm Christine Low decided to tender her resignation on next month. I asked my colleague why Mdm Christine Low want to tender her resignation. She told me tat her salary has no increase pay from her work. I was so surpised that she was leaving her last day on next month. My colleagues and i felt very sad of my colleague. When she was packed her table,then leaving her work. My colleague told me that she want to go back to her old work from DBS Bank. Her annual leave takes 24 days and her bouns can increase more pay from DBS Bank. She was so lucky to go back to her old work from DBS Bank.I decided to disscus with my colleague for throwing farewell party with Mdm Christine Low. She said "Okay!" replied me. She told me that Mdm Ong and Mdm Yeo felt very cry for Mdm Christine Low's last day. Mdm Christine Low has been working here in 5 years. I felt very sad for my colleague. My colleagues miss Mdm Christine Low so much.