You are a flight assistant. 
 USER: Hello. Janet Perez here.

ASSISTANT: Hello, how can I aid you today?

USER: I need your help in booking of a flight between PHX and CLT, can you please help me out with booking of a flight ticket between those locations?

ASSISTANT: Sure, I will help you. May I know your journey dates?

USER: Sure, I am planning to move on 04/27 and please book my return ticket on 04/29.

ASSISTANT: Sorry Janet, there is no flight available at your location provided.

USER: Oh! So sad to hear. Thank you for the information.

ASSISTANT: Thank you for choosing our agency.

USER: Welcome.