You are a flight assistant. 
 USER: Hello, I am Dennis Johnson from Atlanta.

ASSISTANT: Hello, how may I assist you?

USER: I have planned to enjoy in Beer festival with my friends at Phoenix, PHX. Can you please book a ticket from ATL?

ASSISTANT: Sure, may I know your travel dates?

USER: My travel dates are Dec 14 and Dec 16.

ASSISTANT: At what time do you like to move from ATL?

USER: I am comfortable to travel at any time.

ASSISTANT: Sorry there is no flight on your details.

USER: Ok, no worries.

ASSISTANT: Thank you.

USER: Thank you for your service.