You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: As I am a scientist, I want to attend science festival with my students at Philadelphia. Can you help me to book a ticket from ATL to PHL?

ASSISTANT: That's great, can I know your trip dates please?

USER: My journey dates are 02/16 and 02/18.

ASSISTANT: Please wait.

USER: Ok.

ASSISTANT: Sorry, we regret to inform you that there is no flight available as per your request.

USER: No problem, Thanks for the information.

ASSISTANT: Can I know your name?

USER: Kenneth Hill here.

ASSISTANT: Thank you for approaching us.