I saw this girl through my internship and coincidentally we both got back to the same company after one year. I talked to her through office mail and we got to know each other. I'm taking takes slow to avoid complications as we are from the same company but different level. we will see each other in the building and talk a bit when we are on our way to office or when we have company events. Ok, I got her number after like 1 month since i started working. Question is do I message her that night right after I got the number or wait for some time before messaging?