Phrases Negotiation and Bargaining Phrases

I'm not sure I can agree to that.

B2

Meaning

I'm hesitant to accept your proposal.

Example sentences

John: I need you to finish this project by Friday.

Alice: I'm not sure I can agree to that. The deadline is very tight.

John: Can we find a compromise? What if we extend it to Monday?

Alice: Okay, Monday works. Thanks for understanding. Although, I'm not sure I can agree to that much extra work.