You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you now?

USER: I got an invitation to Independence Hall at Philadelphia, can you find the tickets availability on 03/31 to 04/02?

ASSISTANT: Congratulations. Actually, it is great to hear.

USER: Thank you.

ASSISTANT: I am happy to help you with finding a flight for you. May I know your basic details like airport codes?

USER: Sure, my airport codes of travelling are from ATL to PHL.

ASSISTANT: Thank you for providing. Please wait a moment to find a flight for you.

USER: Please find me a direct flight due to urgency.

ASSISTANT: Sure, please wait. Thank you for waiting. Sorry to inform you, no airlines is running flights in your route on your dates.

USER: Ok, no issues.

ASSISTANT: May I know your good name for documentation purpose?

USER: My name is Anthony Carter. Thank you for your service.

ASSISTANT: Most welcome. Thank you for choosing us.