You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I aid you?

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

ASSISTANT: Sure, can you share your trip dates?

USER: My trip dates are Nov 11 and Nov 13.

ASSISTANT: Do you have any specifications?

USER: No specifications.

ASSISTANT: May I know your name?

USER: Myself Patrick King.

ASSISTANT: Sorry, there is no flight on your given dates.

USER: Ok, fine thank you for checking.

ASSISTANT: Thank you for reaching us.