You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: Please book a ticket from ATL to PHX to meet my childhood friend on his birthday.

ASSISTANT: Sure, may I know your travel dates?

USER: My journey dates are June 13 and June 15.

ASSISTANT: Please share me your name.

USER: I am Jason Campbell.

ASSISTANT: Sorry, there is no flight at this moment.

USER: Ok, no issues.

ASSISTANT: Thank you.

USER: Thank you.