You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I am Carol Garcia. I am planning to book a ticket to attend a meeting at EWR. Can you please help me out from PHL?

ASSISTANT: May I know your desired travel dates please?

USER: I am planning to travel on Mar 24 and return back on Mar 26.

ASSISTANT: Sorry to say, there is no flight on your desired travel dates.

USER: That's fine, thank you for your service.

ASSISTANT: Thank you for opting us.