I myself checked and replied. You can use this format and modify it as it is applicable to you: 

“Representative [Whomever]: 

You indeed seem to have accomplished quite a lot this week. Being a resident of [applicable] area and a constituent of Congressmembers in that area, I especially notice that one accomplishment is missing. That accomplishment is the drawing up of articles of impeachment against President Trump. 

”Given President Trump’s continued unConstitutional behavior—much of which certainly falls under ‘high crimes and misdemeanors’—I ask that you consider accomplishing part of what fulfills the Constitutional mandate that ‘The President, Vice President and all civil Officers of the United States, shall be removed from Office on Impeachment for, and Conviction of, Treason, Bribery, or other high Crimes and Misdemeanors.’ (Article Two, Section Four)

“On behalf of myself and all other U.S. citizens whom attempt to abide by the Constitution, I thank you for considering my request to ‘establish Justice, insure domestic Tranquility, provide for the common defence, promote the general Welfare, and secure the Blessings of Liberty to ourselves and our Posterity’ by drawing up articles of impeachment against President Trump—whom repeatedly demonstrates to disregard the preamble of the Constitution, the supporting articles therein, and amendments thereto.

“[Name and Congressional District of State or Territority]”