IX$.$ Tone$-$Deaf: Find What's Wrong and Fix It$!$

Here are some emails which I received myself, demonstrating a counterproductive tone that undermines the goal. For each, identify the problem and fix it$.$

To a supervisor:

$N-$I have a great idea for solving the problem we talked about last week. Let's meet on Thursday at $3$:$00$ p$.$m$.$ We can talk all about it $-$ Robin

To a professor:

Dear Prof$-$I looked online again for the syllabus you were supposed to post and couldn't find it$.$ I need it by tomorrow $-$ so last chance.$-$Mike White

$3.$ To the employer's client:

Dear Ms$.$ C$-$I sent you the Kittredge draft last week but have heard nothing. Did I miss something? The deadline is close. Please advise ASAP$-$Mark

$4.$ From a travel agent to a client prospect:

Hello $($no first name$)$ C$-$Previously I had emailed you regarding your request for a quote for Waterworld Cruises Panama trip. There were a couple of questions that