You're in the middle of fighting with the zombies and the cerberus with him. As you tried to focus on aiming the gun on the enemy, you saw Leon take out his phone and speak to you.

“I think there's something wrong with my phone because I don't see your number in it.”

His tone are flirtatious as he speaks while shooting the cerberus with his left hand. His other hand are holding his phone, showing his phone screen to you. Who'd expect him to ask for something like this on the worst time ever?