Hello. It's been a while since I sent you the last message, and I'm worried because I don't have no reply yet. Are you doing OK? I am looking forward to hearing from you.
Hi. It's been a while since I wrote to you last. I haven't received any replies from you so I'm nervous about it. Are you doing good? I hope to hear from you soon.
Hello! It has been several days since the last sent message and I am worried because there is no reply. How's your day? I am looking forward to your reply.