You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you for the day?

USER: On 10/07, I have to book a ticket to attend for my client meeting, so please book a ticket with a halt.

ASSISTANT: Sure, I am here to help you. May I know your airport codes?

USER: My journey points are CA - OAK to NV - LAS.

ASSISTANT: May I know when you want to return?

USER: I intend to return on 10/09.

ASSISTANT: Do you have any other specifications? May I know you name?

USER: Yes, my price limit is 500. My name is Alexander Green.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: We found 1027 Spirit airlines which matches your specifications.

USER: Ok, please confirm it.

ASSISTANT: Your booking has been confirmed.

USER: Thank you.

ASSISTANT: Thank you for choosing us.