What does the man agree to do?

M: Oh no, it’s raining again. What can you do in London on a day like this?
W: Oh, come on! You can do a million things. We can take a boat trip to Tower Bridge.
M: A boat trip? In this weather?
W: We...we can go to the top of the London Eye to get a view of the whole city.
M: But you can’t see anything in the rain.
W: Yeah, you re right I know!  Let’s go to the British Museum. There are lots of things to see.
M: Okay, it’s a deal. But first, can we get an umbrella?