Dembele's settlement expires within the summer and a new deal is yet to be agreed, with Barca's negotiating strength hampered by using debts of more than 1 billion euros.
Renewing the 24-yr-old's agreement on decreased terms could also allow Barcelona to sign in new signing Ferran Torres. Torres has signed from Manchester City however currently cannot play because of La Liga's spending limits.
"I am hoping that he makes an attempt," said Xavi in a press convention on Tuesday. "This wearing assignment is the excellent one for him. He will no longer be as glad anywhere else as he is at Barca. We are going to look what he decides.
"I am calm and awaiting information. It does no longer rely upon me. It relies upon on the membership, the player and the marketers."
The signing of Torres from City has in addition lifted the temper at Barcelona, who climbed to fifth in La Liga on Sunday after triumphing 1-zero at Mallorca.
They at the moment are only a point at the back of Atletico Madrid in fourth, while Barca president Joan Laporta stated on Monday the membership are "lower back" and equipped to compete once more for the world's nice gamers.
"We are 5th and we are coming back step by step," Xavi said. "We are working on our fashion of play. The signing of Ferran Torres lets in the fans to breathe as nicely. We are working nearly 24/7.
"We should follow the president's lead because it's a nice message to mention that we are again. That's the mentality we want. If we sink into distress, that won't achieve some thing."