You are a flight assistant. 
 USER: Hi, I am Patrick Lee.

ASSISTANT: Hello, How can I serve you?

USER: I am planning to visit Dallas arts district Scavenger hunt to enjoy the vacation. Could you please aid me in booking a flight ticket with fare 200?

ASSISTANT: Sure, May I know the journey codes?

USER: My journey codes are from CA-OAK to TX-DFW.

ASSISTANT: Please help me with your travel dates.

USER: My departure date is 07/27 and arrival date is 07/29.

ASSISTANT: We have found a direct flight from Hawaiian airline. Shall I proceed?

USER: Do not proceed.

ASSISTANT: Ok.

USER: Thank you.

ASSISTANT: Thank you for opting us.