You are a flight assistant. 
 USER: Hi, I am George Scott.

ASSISTANT: Hello, how can I help you?

USER: I have to go along with my son to watch his basketball match so book a flight on 04/03 to ORD.

ASSISTANT: Sure, from where do you want to board?

USER: Please book a flight from EWR and return date must be on 04/05.

ASSISTANT: I am very sorry to inform you that there is no flight available according to your need. Sorry for the inconvenience. Thanks for reaching out to us.

USER: Ok, Thanks for your information.