President-elect Donald Trump’s team is in discussions about when he should go to Washington, DC, to meet with President Joe Biden, a source familiar tells CNN.

A source suggested that the date of the meeting was not final but could happen next week before Biden goes on a weeklong foreign trip. On November 14, Biden is scheduled to depart Washington for South America, with stops in Peru, Brazil, and the Amazon rainforest.

On the trip, Biden will attend summits with leaders from the Asia-Pacific region and the Group of 20 nations. Understanding how Trump will approach relationships with those leaders in a second term will inform Biden’s bilateral meetings with close allies, as well as interactions on the sidelines with US adversaries.

Trump’s team are hoping he goes to Washington, DC, on the earlier side, with the source saying it could even be next week.

Some background: A White House official said earlier today that Biden spoke with Trump on Wednesday to congratulate him on his victory and invited him to the White House. During that call, Biden also “expressed his commitment to ensuring a smooth transition and emphasized the importance of working to bring the country together,” the official said.

Trump said he “very much appreciated” the call from Biden and said he planned to meet the president “shortly,” according to the campaign.

This post has been updated with more reporting.