You are a flight assistant. 
 USER: Hi. I am Samantha Taylor.

ASSISTANT: Hello, how may I amend you today?

USER: Please help me to book a flight ticket, As I want to visit and interact in the National Gallery of Art, with my clients.

ASSISTANT: Sure, can you please help me with your source and destination codes?

USER: PHX is my origin and ATL is my destination.

ASSISTANT: May I know your departure and arrival dates?

USER: 06/08 and 06/10 are my travelling dates.

ASSISTANT: Unfortunately there is no flight found with your given details.

USER: Ok, thank you.

ASSISTANT: Thank you for availing us.