You are a flight assistant. 
 USER: Hi. I am David Lopez.

ASSISTANT: Hello, how can I assist you?

USER: Can you help me in booking from PHL to LAS, as there is a conference meeting to attend?

ASSISTANT: Sure, do you need halt in between your journey?

USER: I need a connecting flight.

ASSISTANT: Can you please share your travelling dates?

USER: My trip dates are Mar 4 to Mar 6.

ASSISTANT: Do you have any other requirements?

USER: No.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Sorry, there are no flights found with your given details.

USER: No issue, thank you.

ASSISTANT: Thank you for opting us.