You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you at this moment?

USER: I need to reserve a ticket from LAS to EWR, can you help me in doing that?

ASSISTANT: Sure, can you please forward your journey dates?

USER: My trip dates are Nov 25 to 27.

ASSISTANT: May I know your name please?

USER: I am Raymond Allen.

ASSISTANT: Can you please mention your connection limit?

USER: I need a direct flight.

ASSISTANT: Are there any more specifications?

USER: Please ensure that my depart time must be in afternoon.

ASSISTANT: Sorry, there are no flights are available matching your specifications.

USER: Ok, no issues. Thank you for the information.

ASSISTANT: Thank you for choosing us.