Verb conjugation of "flaquear" in Spanish

We would love to have you here as our guests! My niece Katja had also many diffculties with the new surroundings. She is really upset with this new change. How was your trip to Italy? I'll keep writing to you!
I was a little confused because I recognized the voice and I had booked at Luisa's guest house. She explained me that she was sharing the phone with her neighbor and her neighbor was not honest.
The flight was a little late so we spent our time in the airport playing car race computer game. My wife won three times in a row, she is a better driver than me anyway. We flew to Puerto Madryn.