Good Day,
Although I have no experience with being a virtual assistant, seeing that this would only be based on emails and chat, I can confidently say that I am perfect for the job.
My last work required me to handle all the emails of the company, forwarding them to the concerned groups, downloading all necessary attachments and organizing them. I was also required to reply to everyone of them, to know that they have been seen and passed on.
With this, I hope you could trust me with your project. It would be done with no errors, would be following every bit of your instructions and most importantly, I would be trustworthy of all your emails.