You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Edward Hill.

ASSISTANT: How may I help you now?

USER: I am planning to visit New York NY-EWR, for overview of city.Could you please help me in booking a flight ticket from TX-AUS?

ASSISTANT: Sure, I will help you. May I know your depart date?

USER: My depart will be on 12/25.

ASSISTANT: Kindly, mention your fare limit.

USER: Fare limit is below 200.

ASSISTANT: Can I have your return date?

USER: I intend to return on 12/27.

ASSISTANT: Thank you for sharing the details. I am sorry to inform you that, there are no flights available that matches your requirements.

USER: Ok, no issues. Thank you.

ASSISTANT: Thank you for approaching us.