French phrase
Je ~ modifier ma réservation.
Meaning
I would like to ___ my reservation.
When to use it
A polite request to change a reservation. It is common in customer service contexts.
Example dialogue
Je voudrais modifier ma réservation.
I would like to change my reservation.
Bien sûr, je peux vous aider, quelle date préférez-vous ?
Of course, I can help you. Which date would you prefer?