The conditional tense is being used as a form of politeness. By expressing a modicum of doubt about the outcome, the respondent is offered the opportunity to refuse politely.

"Is this report something that your team can handle for me?" "Nope, we're too busy."

versus

"Is this report something that your team could handle for me?" "We would help you but unfortunately the team is very busy.

The conditional tense is being used as a form of politeness. By expressing a modicum of doubt about the outcome, the respondent is offered the opportunity to refuse politely.

"Is this report something that your team can handle for me?"

"Nope, we're too busy."

versus

"Is this report something that your team could handle for me?"

"We would help you but unfortunately the team is very busy.