You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I guide you today?

USER: Please assist me in booking a flight ticket from OAK to LAS.

ASSISTANT: Sure, can you please share your preferable journey dates?

USER: My preferable travel dates are from Dec 26th to Dec 28th.

ASSISTANT: May I know your name please?

USER: I am Jacob Wilson.

ASSISTANT: Do you have any connection limit?

USER: Yes, I want a single connection.

ASSISTANT: Is there any specifications?

USER: Yes, I want to depart in the afternoon and return in the morning. I want an economy class to travel.

ASSISTANT: I am sorry to say that there is no flight found under your details.

USER: Ok, no issues. Thank you.

ASSISTANT: Thank you for reaching us.