Consider the dialogue below: Anna: I don't understand why Mark didn't come to t...

Consider the dialogue below:
Anna: I don't understand why Mark didn't come to the meeting today. He's usually the first one here.
John: Well, I saw him rushing out of the office yesterday, looking pretty upset.
Anna: Really? I didn't notice anything unusual.
John: Yeah, he had his phone in his hand the whole time, and when I asked if he was okay, he just said, "I have to deal with something urgent."
Anna: Hmm, I hope everything is alright with him. Maybe he had a personal emergency.
John: Possibly. He didn't mention anything specific, but I have a feeling it's serious.
Based on the dialogue, what can we infer about Mark's absence from the meeting?