You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you today?

USER: I am Debra Lewis, can you please book the flight ticket from PHX to CLT? I want to meet my brother.

ASSISTANT: Sure, I will help you with booking, please share your travelling dates?

USER: I want to depart on 09/21 and return on 09/23.

ASSISTANT: Lewis sorry for the inconvenience, no flights as per your details. Thank you for reaching us.

USER: No problem, thank you for checking.