answer: #Person2# tells #Person1# a traffic accident caused the traffic jam and it will be over soon.
documents: #Person1#: Excuse me, I've been waiting here for fifteen minutes. Do you know why the traffic is so heavy?
  #Person2#: A lorry overturned on the road and blocked it, so all the traffic was held up.
  #Person1#: Oh, what a terrible situation! This traffic is unbearable.
  #Person2#: Yeah, traffic was brought to a standstill by the accident. If we had gone early we would miss the traffic.
  #Person1#: I agree with you. But now we have to wait. The sky is overcast, and it is very sultry. I fear a thunder storm is brewing.
  #Person2#: Don't worry. The traffic jam is said to be over soon.
  #Person1#: Yes, I hope so. Thank you for telling me this.
  #Person2#: It's my pleasure.