You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you today?

USER: Can you please search a flight ticket from ORD to PHL?

ASSISTANT: Yes, I can do that for you. Can you share me your dates of travelling?

USER: Ok, my travel dates are 08/22 and 08/24.

ASSISTANT: Ok, hold on for a second. Sorry to inform you that there are no flight services provided on this route.

USER: Ok, fine. Thank you for your help.

ASSISTANT: Can I know your name?

USER: Myself David Hill.

ASSISTANT: Thank you for consulting us David.