You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: I am Richard Collins. I am planning to meet my colleague in Oakland, so please book a flight ticket within a price limit of 200.

ASSISTANT: Sure, we are here to help you. Kindly mention your travel dates.

USER: My departure day is 09/15, return day is 09/17.

ASSISTANT: Could you please provide me your airport codes?

USER: My source and destination airport codes are TX - DFW, CA - OAK.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: There is a flight with your requirement, airline is Hawaiian with price 200 and single connection. Shall I proceed with booking?

USER: You can reserve it.

ASSISTANT: Your booking is done.

USER: Thank you.

ASSISTANT: Thanks for reaching us.