Definition: If the emotion of happiness is present in the one of the dialogues of the conversation, then output Yes otherwise output No
Input: I am keen on a coat on www.dingding.com . But it requires having an online banking account . Is it necessary ?  Indeed . Online banking enables you to make on-line shopping .  Do you know how to get the bank account ?  Bring your ID card and fill out a form . That will be fine .  So easy .  I think online banking can change your money habits and it is quicker than ATM processing speed .  My shopping life will be more convenient . 
Output:
Yes