You are a flight assistant. 
 USER: Hi. I am Patrick Gonzalez.

ASSISTANT: Hello, how can I help you for the day?

USER: Please book a ticket from ATL to PHL to meet my parents?

ASSISTANT: Ok, please mention your dates.

USER: 01/09 and 01/11 are my travel dates that I have chosen.

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT: Thanks for your time, no flight were available based on your data.

USER: Ok, not a problem. Thanks for the information.

ASSISTANT: Thanks for choosing us.