You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Myself Ryan Adams.

ASSISTANT: How may I assist you today?

USER: I am planning to visit Dallas, will you help me in booking the flight ticket from PHL to DFW?

ASSISTANT: Sure, I am glad to help you with your flight ticket booking Adams. Could you please let me know your planned dates of your journey?

USER: My travelling dates are 09/25 and 09/27.

ASSISTANT: Sorry, I could not find any flight with your travelling dates.

USER: Ok, not an issue. Thank you for your information.

ASSISTANT: My pleasure.