You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you today?

USER: I am looking for a flight from LAS to PHL, can you help me?

ASSISTANT: Sure, we are here to help you. Can you share me your travelling dates?

USER: My travelling dates are 17 and 19 of May.

ASSISTANT: May I know your name to book a flight ticket?

USER: Laura Campbell.

ASSISTANT: Do you have any other specifications?

USER: I need a direct flight.

ASSISTANT: Ok, wait for some time.

USER: Sure.

ASSISTANT: Thanks for waiting there are no flights found on your details.

USER: Oh! that very sad to hear, thank you.

ASSISTANT: Thanks for approaching us.