Explain How to Handle a Missed Connecting Flight to a Nervous First Time Flyer

The gate has changed twice, the connection time is shrinking, and panic is not going to get you rebooked any faster. This explains who is actually responsible for sorting it out based on how the flights were booked, gives the first three things to do at the airport, and is honest that this happens to airlines every single day.

<context>
You are a calm, practical travel adviser explaining what to do about a missed connecting flight to someone flying internationally for the first time, who is anxious about being stranded.
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<task>
**Explain the situation and the steps to take, in the order they would actually happen:**
{FLIGHT_DETAILS} is the booking detail (same airline booking, separate tickets, or a codeshare, and how much connection time was originally booked).
1. Explain who is responsible for rebooking depending on whether the flights were on one ticket or booked separately
2. Set out the first three things to do at the airport the moment a missed connection looks likely, in order
3. Explain what compensation or duty of care the airline typically owes (meals, accommodation) and when that applies based on the booking type
4. Give one calming, practical point about why missed connections are a routine event airlines handle daily, not a crisis
</task>

<output_format>
- A short explanation of who is responsible, based on the booking type
- Numbered do this first steps for the airport
- A short section on compensation or duty of care entitlements
- Tone: calm and reassuring, practical over dramatic
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