You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you?

USER: I want to book a flight ticket to attend a party at AZ-PHX from TX-DFW.Can you help me?

ASSISTANT: Sure, please provide me your travel dates.

USER: 06/25 and 06/27 are my travelling dates.

ASSISTANT: Let me know your price limit please.

USER: 200 is my price.

ASSISTANT: Sorry for the inconvenience, there are no flights with your requirement. Can I have your name please?

USER: I am James Davis.

ASSISTANT: Thanks for choosing us.

USER: Thank you.