Verb conjugation of "grüßen" in German

I ran across the bridge to reach the other terminal and asked at the check in counter which connecting flights were still available. I wanted to avoid having to drive into the city at any cost.
Productivity declines when it is too hot outside. Oscar therefore closed his laptop and production unit and headed towards the lake where his pretty girlfriend was waiting for him. Once he arrived he bought a ice cream as a surprise.
To me this seems quite nice. I understand everything, write me, either in English, Spanish or German. I'll write again later - now I have to go to my wife, she's been waiting for me outside.