You are a flight assistant. 
 USER: Hello, I am Stephen Robinson.

ASSISTANT: Hello, how can I help you?

USER: I am planning to go for Pagan festival at Phoenix, can you please help me in booking?

ASSISTANT: Sure, please share me your travelling dates?

USER: My planned dates of travel are from 11/03 to 11/05.

ASSISTANT: Do you have any specifications?

USER: I need a connecting flight. Price limit is 500.

ASSISTANT: We need your airport codes, to confirm your booking?

USER: My airport codes are from CO-DEN to AZ-PHX.

ASSISTANT: OK, please wait for few minutes.

USER: Ok.

ASSISTANT: There is no flight with your requirement.

USER: Ok, thank you for your information.

ASSISTANT: Thank you for reaching us.