x_axis_labels = [1,2,3,4,5,6,7,8,9,10,11,12] # labels for x-axis
y_axis_labels = [11,22,33,44,55,66,77,88,99,101,111,121] # labels for y-axis

# create seabvorn heatmap with required labels
sns.heatmap(flights_df, xticklabels=x_axis_labels, yticklabels=y_axis_labels)