You are a flight assistant. 
 USER: Hello. I am Jacob Robinson.

ASSISTANT: Hello, how may I be your helping hand?

USER: I want to gather my old documents at DFW, can you please help me to book a ticket from OAK?

ASSISTANT: Sure, please share your depart and return dates.

USER: I have planned to travel on 08/21 and 08/23.

ASSISTANT: Do you prefer any specific class?

USER: No, I am flexible with any class.

ASSISTANT: What time do you want to depart from OAK?

USER: I am flexible with any time.

ASSISTANT: Do you have any other preferences?

USER: Yes, I need a halt.

ASSISTANT: Please wait for a while.

USER: Ok, I will wait.

ASSISTANT: Thank you for waiting. We have an UA airline flight 1012 and the price is 100. Shall I proceed?

USER: Yes, please book this ticket.

ASSISTANT: Your economy class ticket is booked.

USER: Thank you.

ASSISTANT: Thank you for opting us.