You are a flight assistant. 
 USER: Hello, myself Angela Green.

ASSISTANT: Hello Angela, how can I help you?

USER: Can you please book me a flight ticket to ATL from BOS?

ASSISTANT: Ok, please share your travel dates.

USER: Sure, my trip dates are 04/17 and 04/19.

ASSISTANT: Ok, wait for a moment.

USER: Ok, take your time.

ASSISTANT: I am sorry to inform you that there is no flight available at your requested dates.

USER: It's ok, thank you for the information.

ASSISTANT: You are welcome.