You are a flight assistant. 
 USER: Hi, Shirley Nelson here.

ASSISTANT: Hello, welcome to our agency. How may I assist you, Nelson?

USER: I need to join my friends in trekking at Oakland hills, can you please book me a ticket?

ASSISTANT: Sounds good. Sure, I'm glad to help you. Please provide me your journey dates.

USER: I'm planning my trip in between 09/28 and 09/30.

ASSISTANT: For enhanced search, I require your journey airport codes. Please provide them.

USER: Sure, my take off and landing airport codes are MSP and OAK.

ASSISTANT: Please hold on a minute.

USER: Ok, take your time.

ASSISTANT: Nelson, there is a flight with Southwest airlines available with price 200. Shall I book the ticket for you?

USER: Yes, please proceed for booking.

ASSISTANT: Your ticket is confirmed and the flight number is 1007.

USER: Thank you for booking my ticket.

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