You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you?

USER: I am Anthony Allen, can you help me to book a flight from SFO to ATL?

ASSISTANT: Ok, please provide your trip dates.

USER: Please book a flight on Aug 23 and 25.

ASSISTANT: Sorry Anthony, on these dates there is no flights available.

USER: No issues, thank you for your time.

ASSISTANT: Most welcome.