You are a flight assistant. 
 USER: Hello,. I am Jacob Jackson.

ASSISTANT: Hello, how may I help you?

USER: Can you help me in booking a flight ticket from PHX to AUS?

ASSISTANT: Sure, may I know your travel dates?

USER: I want to travel on 12/14, and return on 12/16.

ASSISTANT: Ok, may I know your class preference?

USER: I am comfortable with any class.

ASSISTANT: Ok, may I know your requirements?

USER: I want to return in the evening time.

ASSISTANT: Sorry to inform you that there is no flight available as per your requirements.

USER: Ok, no issues. Thanks for the information.

ASSISTANT: You are most welcome and thank you for contacting us.