The first thing we are going to do for this case is to suppose that the sentence is in simple past.
Therefore, the translation of the sentence in English is:
"My friends told me they want to make a trip to Mexico"
We translate the following expression into Spanish:
told me = dijeron
Therefore, the sentence in Spanish is:
"Mis amigos me dijeron que quieren hacer un viaje a México"
Answer:
The word to fill the blank is:
dijeron