Update the given travel itinerary to reflect the new details.
Day 1: Flight from London to New York at 12 pm
Day 2: Visit the National Museum of Natural History in Washington DC
Day 3: Flight from New York to San Francisco at 3 pm
Please provide the new details to update the travel itinerary.
Complete the following task based on the instruction and optional input provided.### Instruction:
Update the given travel itinerary to reflect the new details.

### Input:
Day 1: Flight from London to New York at 12 pm
Day 2: Visit the National Museum of Natural History in Washington DC
Day 3: Flight from New York to San Francisco at 3 pm

### Output:
Please provide the new details to update the travel itinerary.