You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Raymond Brown.

ASSISTANT: How can I aid you at this moment?

USER: Could you please help me in booking a flight ticket from OAK to CLT?

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

USER: My journey dates are Oct 15th and Oct 17th.

ASSISTANT: Do you have any connection limit for this trip?

USER: Yes, I need a connection limit.

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

USER: The return time should be evening.

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

USER: No.

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

USER: Ok, no issues. Thank you.

ASSISTANT: Thank you for contacting us.