Translation of mouthwash in German

So we decided to move on. We were looking to get the next flight to Hoi Ann, which is located right in the center of the country, but we were told that there had been floods a week earlier.
Did you receive my email? Are you going to call me back and help me? Would you be able to help me?? Please? Your English very is very well already. I will correct you if you make any spelling mistakes.
Unfortunately, I have never been to the United States, but I was in Mexico last year, that is close. Zurich is a very nice city, the people are friendly and the lake is very beautiful.