You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: I am Roberts Gonzalez. Can you please help me in booking a normal cost airline ticket from Phoenix, AZ to reach Atlanta, GA?

ASSISTANT: Sure, can you please share your travel dates?

USER: My travelling dates are from Oct 26 to Oct 28.

ASSISTANT: Could you please help me with the airport codes?

USER: My airport codes are PHX and ATL.

ASSISTANT: Do you have any class preference?

USER: No, I am comfortable with any class.

ASSISTANT: Is there any requirement that you are looking for?

USER: Yes, my departure time is afternoon and return time is morning.

ASSISTANT: Roberts Gonzalez, I am sorry to inform you that there is no flight available at your request.

USER: That's ok, not a problem. Thanks for your information.

ASSISTANT: You are welcome. Thank you for contacting us.