You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: I am Dennis Davis, can you help me to book a flight from LAX to PHL?

ASSISTANT: Sure, I will help you. Can I have your trip dates please?

USER: My travel dates are 08/24 and 08/26 respectively.

ASSISTANT: Please wait a moment.

USER: Ok.

ASSISTANT: Sorry, no flights are available on your route.

USER: That's ok, not a problem. I will book next time. Thank you for assisting me and providing the information.

ASSISTANT: Welcome, have a safe flight.