You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you today?

USER: I would like to book a ticket from SFO to LAS, can you please help me out?

ASSISTANT: Sure, can you share your travel dates?

USER: I am travelling on these dates Dec 27th and 29th.

ASSISTANT: May I know your good name please?

USER: Check the reservation on the name Richard White.

ASSISTANT: Do you have any connection limit?

USER: I need single connected flight.

ASSISTANT: Is there any time concern?

USER: I prefer return time in the morning.

ASSISTANT: Do you have any other specifications?

USER: I don't have any other preferences.

ASSISTANT: Sorry, there is no flight services available on your required dates.

USER: Ok no problem, thank you for your services.

ASSISTANT: Thank you for reaching us.