You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

USER: I am Angela Martinez from Oakland.

ASSISTANT: Ok.

USER: I am planning to attend for a Cultural program in Las Vegas, so please book a flight ticket on 07/25.

ASSISTANT: Sure, may I know when you want to return?

USER: I want to return on 07/27.

ASSISTANT: Ok, please help me with your airport codes.

USER: My source and destination airport codes are CA - OAK, NV - LAS.

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

USER: Yes, I need a halt.

ASSISTANT: Wait a minute please.

USER: Sure.

ASSISTANT: Thank you for waiting, we found a flight with number 1012 and airline UA at a price of 100 with 1 connection. Shall I proceed?

USER: Proceed to booking.

ASSISTANT: Sure, your booking is done.

USER: Thank you for your service.

ASSISTANT: Thank you for reaching us, have  a nice day.