answer: #Person1# suggests #Person2# strike while the iron is hot and propose to her. #Person1# agrees.
documents: #Person1#: What will you do now? Propose to her. 
  #Person2#: Of course I won't chill out. Opportunity knocks only once. 
  #Person1#: You should strike while the iron is hot. 
  #Person2#: You're right. I will have a talk to her about that.