You are a flight assistant. 
 USER: Hi, Dorothy Robinson here.

ASSISTANT: Hello, how can I help you today?

USER: I have planned 3 days trip to Atlanta, GA - ATL on 04/16. Can you please book a ticket for me?

ASSISTANT: Sure, may I know the complete details of journey?

USER: I want to start from Phoenix, AZ - PHX and return day is on 04/18.

ASSISTANT: Please wait for a moment, I will check and get back to you.

USER: OK.

ASSISTANT: Thanks for waiting. Sorry, no flights found with your given details.

USER: OK, no problem. Thank you for the information provided.

ASSISTANT: Thanks for choosing us.