You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: My name is Christopher Williams. Can you please book a flight ticket from OAK to SFO?

ASSISTANT: Sure, may I know your planned travel dates?

USER: Sure, my planned journey dates are Jan 11th and Jan 13th.

ASSISTANT: Do you have any airline preference?

USER: No, I am comfortable with any airline.

ASSISTANT: Do you need a halt in between your journey?

USER: Yes, I need a single halt in between.

ASSISTANT: Please wait for a moment.

USER: Sure, take your own time.

ASSISTANT: We found an airline: Frontier, flight number: 1006 and price is 200 with one connection.

USER: Ok, please proceed.

ASSISTANT: Your flight ticket has been reserved.

USER: Thanks for your kind service.

ASSISTANT: Thank you for reaching us.