Here is an exercise from English Grammar in Use Supplementary Exercises by Loise Hashemi and Reymond Murphy.
I. "Ben's doctor has advised him to join a health club. The instructor is going to help him to plan his fitness programme. Write the instructor's questions. Read the whole conversation before you begin".
Instructor: Ok, Ben. Let's find out how fit you are. First of all, how old are you?
Ben: I'm 32.
Instructor: And how much do you weigh?
Ben: About 75kg.
Instructor: And how tall are you?
Instructor: What do you do for a living?
Ben: I work in a call centre for a bank.
Instructor: Really? So, do you exercise regularly?
Ben: Well, I take some exercise, but it's not regular.
Instructor: Do you do any sports.
Ben: No, I haven't done any sport since I left school. I sometimes go for a walk on my day off if the weather's good.
Instructor: I see. Do you have a healthy diet?
Ben: No, I wouldn't say I had a healthy diet exactly. I like fast food too much and I drink about 15 cups of strong coffee every day.
Instructor: That's a lot of coffee. Have you tried to give up coffee?
Ben: Well, I tried to give up coffee about a year ago, but then I started falling asleep at work. My doctor says I must try again.
Instructor: Well, we can give you some help with that. It's really important at least to cut down on the amount of coffee you drink. Now if you'll come with me, I'm going to do a few checks and then we'll make a plank for you.
Ben: Ok. Thanks.
So, in the highlighted sentences I am dubious about this excerpt: "No, I wouldn't say I had a healthy diet exactly". I have a feeling that it should be something like this: "No, I wouldn't say I have a healthy diet". Since he says that he still likes fast food too much, I believe it would be more coherent. Nevertheless I might be wrong :D