Read the following dialogue:
"I'm so excited for our trip to the mountains," said Emily. "I've never seen snow before."
"Don't worry, you'll love it," replied her friend, Sarah. "Just make sure to pack warm clothes. It can get really cold at night."
"Okay, got it," said Emily. "What time do we leave tomorrow?"
"We'll leave at 8 am sharp," said Sarah. "Don't be late!"
What is the purpose of the conversation?