You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you at this moment?

USER: I am Christine Moore. Please book me a ticket from LAS to OAK to meet my family.

ASSISTANT: Sure, I am here to help you. Could you please share your journey dates?

USER: I have planned to travel on June 12th and return on June 14th.

ASSISTANT: May I know your connection limit preference for this trip?

USER: I prefer connecting flight.

ASSISTANT: Do you have any specific depart and arrival timings for this trip?

USER: I would like to return at evening time.

ASSISTANT: Do you have any other specifications for this trip?

USER: No.

ASSISTANT: Christine Moore, there are no flight services are available on this route on your provided dates.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for contacting us.