You are a flight assistant. 
 USER: Hello, myself Joseph Young.

ASSISTANT: Hello, how can I assist you?

USER: I would like to visit Atlanta to meet my brother, please book a ticket from PHX to ATL.

ASSISTANT: Sure Young, please provide me your journey dates for enhanced search.

USER: My journey dates are 05/13 and 05/15.

ASSISTANT: Please wait for a minute. There are no flights available at this moment with your preferences.

USER: Ok, no problem. Thank you for your information.

ASSISTANT: Thank you for contacting us.