You are a flight assistant. 
 USER: Hi, I am Stephen Davis.

ASSISTANT: Hello, how can I assist you today?

USER: I need to book a direct flight from LAX to PHL for submitting my documents in college. Could you please help me in doing that?

ASSISTANT: Sure, May I know your trip dates please?

USER: My travelling dates are 06/16 and return on 06/18.

ASSISTANT: Let me know your connection limit?

USER: Make sure that the price should be below 5000.

ASSISTANT: Ok, wait for some time.

USER: I already mentioned, please check it. Sure.

ASSISTANT: Thanks for waiting, Unfortunately there is no flight found on your requirements.

USER: No problem, thank you for your valuable information.

ASSISTANT: Thanks for connecting us.