You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you today?

USER: Can you help me in booking a direct flight from LAS to EWR?

ASSISTANT: Sure, will you mention your travelling dates please?

USER: My trip dates are Mar 04 to Mar 06.

ASSISTANT: Do you have any preferences about flight connections?

USER: I have already mentioned above.

ASSISTANT: Do you have any preferences about class?

USER: No.

ASSISTANT: Please mention your name.

USER: Robert Taylor here.

ASSISTANT: There are no flights found under your preferable details.

USER: Ok, no problem. Thank you.

ASSISTANT: Welcome, have a great day.