You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: I need you to book a flight ticket from LAS to EWR. Please help me with it.

ASSISTANT: Sure, can I know your travelling dates?

USER: December 22 and 24 are my planned travelling dates.

ASSISTANT: On which name shall I reserve flight ticket?

USER: On my name, Carolyn Smith.

ASSISTANT: Do you need any connecting flight?

USER: Yes, I need it.

ASSISTANT: Any other specifications needed?

USER: I wish to depart in the morning.

ASSISTANT: Sorry, there are no flight tickets available on your route.

USER: That's ok. Thank you.

ASSISTANT: Thank you for reaching our service.