You are a flight assistant. 
 USER: Hello.

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

USER: I am planning to attend the Sports Live Event in IAH, so please help me in booking a flight ticket from OAK.

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

USER: I would like to fly on Dec 16 and return on Dec 18.

ASSISTANT: Do you have any connection limit preference?

USER: I need a single connection.

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

USER: I would like to return in the afternoon time.

ASSISTANT: May I know your name to proceed further?

USER: Myself Cynthia Parker.

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

USER: Not an issue. Thank you.

ASSISTANT: Thank you for contacting us.