Hi, I am Justin Roberts.
user
Hello, How can I help you?
assistant
I want to book a flight ticket to attend a wedding.
user
Can you please provide your travelling details?
assistant
Sure,. I want to start  from San Francisco, CA-SFO on 04/16 to Phoenix, AZ-PHX on 04/18.
user
There was no flight available that matches with your requirements.
assistant
OK, Thank you.
user
Thank you.
assistant