'We should say 'Shehecheyanu'
The young people of Bnei Yisroel who were about to go into Eretz Yisroel. Moshe Rabbeinu in his last address to them retold the story of their parents' mistakes in the Midbar. When retelling the Cheit of the Meraglim, Moshe says that they were punished and routed by the Emori in their effort to go to Eretz Yisroel without permission. After this defeat they came back to the Machaneh and began to cry. The pasuk says (1:45) "V'Lo Shama Hashem B'Kolchem", Hashem did not listen to them. The next pasuk says that they stayed in Kadeish many years. Rashi says that they stayed there for 19 years without wandering around.
The Netziv says that we see from here that even when Hashem does not listen to our tefilos and does not grant our request, the tefila still helps. While their tefilos did not repeal the gezeira of staying in the Midbar for 40 years, it helped that they settled in one place did not need to wander for 19 years. We can't always get what we want but we always get something!