If the emotion of happiness is present in the one of the dialogues of the conversation, then output Yes otherwise output No

[EX Q]: What can I do for you ? I'd like to buy some milk powder . What would you recommend ? We have many kinds of different purpose . I wonder whom you are buying for ? My son . He is two years old . I see , sir . This one is very good . Is it ? You may rest assured . It sells well . May I have a look at the introduction ? Certainly . Here it is .
[EX A]: Yes

[EX Q]: Is there anything I can do for you ? I'm trying to choose a gift . Did you have anything particular in mind ? No , but I'd like to get something typical in this region . Well , we have some handmade products . Let me show you some . They're quite nice . But I'm afraid they're quite a bit expensive . About how much were you planning to spend ? No more than one hundred yuan . Oh , in that case . This one is OK . Oh ! It's perfect . I think I'll take it . Would you wrap it , please ? OK . Wait for a moment , please .
[EX A]: Yes

[EX Q]: How slowly you drive ! I'm sorry . Something is wrong with my taxi . Where does it go wrong ? Let me stop my car for check . Oh , my god . I got a flat tyre . Can it keep going ? Sorry . You'd better get off for taking another taxi .
[EX A]:
No