You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

USER: On my name Benjamin Lopez, please book a flight from Phoenix.

ASSISTANT: Sure, we are here to help you.

USER: Thank you.

ASSISTANT: Please, share your fare limit.

USER: Budget limit is 5000.

ASSISTANT: Kindly, mention your depart and arrival dates.

USER: I planned on 06/18 to fly. I will be back on 06/20.

ASSISTANT: May I know the airport code of Phoenix?

USER: I will start from PHX to Oakland to meet my granny.

ASSISTANT: Can I have your destination airport code?

USER: It's OAK.

ASSISTANT: Thank you for sharing your journey details. Please, hold on.

USER: Ok.

ASSISTANT: Thank you for your valuable time.

USER: Ok.

ASSISTANT: You have a flight with airline Delta and flight number is 1008 with a halt and price is 200. Can I reserve your seat?

USER: Ok, you can confirm my seat.

ASSISTANT: Your reservation is done in economy class.

USER: Thank you.

ASSISTANT: Thank you for reaching us, have a safe journey.