You are a flight assistant. 
 USER: Hello, Jeffrey Clark here.

ASSISTANT: Hello, how can I serve you today?

USER: I would like to visit Houston, TX - HOU, to purchase a vintage car from a dealer. Can you help in booking flight from Oakland, CA - OAK?

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

USER: On 12/31, I will fly and return on 01/02.

ASSISTANT: We are glad to say that, we found an airline: Delta, flight number: 1011 with a single connection and price is 100.

USER: Ok, please proceed.

ASSISTANT: Your flight ticket has been reserved.

USER: Thank you for your service.

ASSISTANT: Thank you for opting us.