ご紹介ありがとうございます。
彼にメールで問い合わせたところ、なかなか返事が帰って来ません。
彼の電話番号やホームページをご存じないでしょうか?
あなたの方から返信を急かしてもらえると非常に助かります。
できるだけ早い返信をお待ちしております。
Thank you for introducing him to me.
However, I am yet to receive a response from him after I have attempted to contact him via email.
If you do know his telephone number or perhaps his homepage on the web, it would be truly helpful for you to urge him to respond.
I would sincerely appreciate a prompt reply.