- Should I sign this document? (I mean give my signature) {Yes, this sentence is correct.} - I've added more details information for your reference. {Details are pieces of information about something very specific. So, the use of "details" and "information" is redundant here. However, if you are using "detailed" as an adjective to describe the type of "information" which is a noun, that's fine: I've added more detailed information for your reference.} - About price for these parts, may we know is there any price you are looking for? Please offer. {The sentence sounds convoluted. In essence, you are requesting the other party to quote a price so that negotiation can begin. You can write: Please quote a price that you are willing to offer for these parts.} - I'm still waiting for the document from Jame. I'll send it to you until I get it. {The use of "until" is incorrect here. "until" is used to describe a time when something ceases to happen -- I'm sure you will not send the documents before you get it and stop sending them when you get it. You can simply write: I'll send it to you when I get it. OR I'll sent it to you once I get it. ("once" adds emphasis to the sense of urgency and priority being placed on the matter. Hope this helps. Lance

Hi, I've edited the following sentences:- - Should I sign this document? (This is alright =D) - I've added more detailed information for your reference. - Feel free to request for the price of the items that you are interested in. - I'm still waiting for the document from Jame. I'll send it to you once I've received it. Feel free to view my teaching profile and class offerings and drop me a message if you feel that I can help you. Have a great day ahead! =D