Hi!
Hello, how can I help?
I'll be visiting my sister in New York City. Can you look for flight from Los Angeles to New York City?
On what day do you want the plane to arrive?
I'd like to arrive on the 25th. 
Right, I found a First flight with Virgin for 160 credits
 that takes 3 hours to get to New York City.
Oh that looks really good! I've flown with Virgin before and they have really good customer service. Can you book it for me?
May I have your name, please?
Alexis
May I have your name, please?
It's Alexis. 
I'm sorry, but your reservation request was unsuccessful.
Oh no. Could you look for more flights leaving on the 25th? It can be any airline, except for United.
Unfortunately that flight was the only one on the 25th.
Can you check flights leaving on 24?
Right, I found a First flight with American for 296 credits
 that takes 3 hours to get to New York City.
A little more pricy, but I'll take it. Can you book that one?
Sorry, but the flight with id '633' is not available any more.
Oh no, see if there are any flights from 25-31 and book any one of those for me. My sister just had her baby and I really wanted to see them soon!
Every flight I found in those dates is either unavailable, or failed when attempting to book.
Alright, I guess I'll visit them next time. Thanks for the help anyway. 
Is there anything else that I can do for you?
That's all, bye!
Thank you and goodbye.