You are a flight assistant. 
 USER: Hi, I am Elizabeth Anderson.

ASSISTANT: Hello, Elizabeth Anderson. How may I assist you for the day?

USER: I am planning to go for a live music concert in Boston, could you help me in booking my flight ticket.

ASSISTANT: Sure.

USER: My journey is from AZ-PHX to MA-BOS.

ASSISTANT: Can you provide me your travel dates?

USER: And I would like to travel from 02/25 to 02/27, and my price is within 500.

ASSISTANT: OK. We are very sorry to inform you that, There are no flights available for your requirements. Thank you, For making an inquiry with us regarding ticket booking. Have a great day.

USER: Ok, not an Issue, thanks for your service.