how to pass parameters for getdate( )

CREATE PROCEDURE dbo.usp_booking_insert
	@user_id int,
	@journey_place varchar(50),
	@pickup_address varchar(250),
@pickupDate datetime,
	@return_address varchar(250),
	@service_id int,
	@vehicle_id int,
@returnDate datetime,
	@mode_of_payment varchar(50),
	@status varchar(5),
	@starting_km decimal(15,4),
	@ending_km decimal(15,4),
	@booking_date datetime
 
	AS		
		insert into booking (user_id,journey_place,pickup_date,pickup_address,return_date,return_address,service_id,vehicle_id,mode_of_payment,status,starting_km,ending_km,booking_date)
		 values (@uid,@journey_place,getdate(),@pickup_address,getdate(),@return_address,@service_id,@vehicle_id,@mode_of_payment,'true',0,0,@booking_date)
 
		End

cmd.CommandText = "usp_booking_insert";
     cmd.CommandType = CommandType.StoredProcedure;
     cmd.Parameters.AddWithValue("@user_id", ddluname.SelectedValue);
     cmd.Parameters.AddWithValue("@journey_place", txtjplace.Text);
   cmd.Parameters.AddWithValue("@pickupDate", txtpickup_calenderri.Text);
     cmd.Parameters.AddWithValue("@pickup_address", txtpickup_address.Text);
    cmd.Parameters.AddWithValue("@returnDate", txtreturndate.Text);
     cmd.Parameters.AddWithValue("@return_address", txtreturn_address.Text);
     cmd.Parameters.AddWithValue("@service_id", ddlsname.SelectedValue);
     cmd.Parameters.AddWithValue("@vehicle_id", ddlvehicles.SelectedValue);
     cmd.Parameters.AddWithValue("@mode_of_payment", rdbtnpayment.SelectedValue);
     cmd.Parameters.AddWithValue("@booking_date", System.DateTime.Now.ToString());