At That Bus Stop

Sebastian:
I'm Sebastian

Harriet:
I'm Harriet

Sebastian:
It's weird. It's my mum's name.

Sebastian:
I was having a discussion with a guy about how to break the chronology protection conjecture using quantum entanglement.

Harriet:
OK, I shouldn't have asked.

Sebastian:
Are you sure I'm good to go?

X:
The coordinates are set precisely as you requested. There should be enough fuel to come back as well.

Sebastian:
Should be?

X:
There's always a possibility of unexpected. That's the risk you gotta take.

Sebastian:
OK.

X:
Please make sure you keep away from anything unnecessary and come back as soon as possible.

Sebastian:
I know.