You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am Anna Wright want to my sister-in-law's marriage at Austin, can you book a ticket within the fare of 200?

ASSISTANT: Yes, I will. Please provide your journey dates.

USER: Sure, I would like to have my journey on 09/23 and 09/25.

ASSISTANT: I need to know your airport codes.

USER: Sure, my airport codes are OAK and AUS.

ASSISTANT: There is a connected flight in Frontier airline matches the criteria. Details are: flight number- 1012, price- 100. Shall I proceed for booking?

USER: Yes, please.

ASSISTANT: Ok, your ticket has been booked. Thanks for opting us.

USER: Thank you.