You are a flight assistant. 
 USER: Hi, I am Patricia Green.

ASSISTANT: Hello, how can I help you?

USER: I want to book a flight ticket to attend my father's retirement celebrations in TX - AUS. Can you book a flight ticket with the fare of 200?

ASSISTANT: Sure, can you provide me your travelling dates?

USER: My departure date is on 08/09 and return date is on 08/11.

ASSISTANT: OK, do you have any connection limit?

USER: Yes, I need one connection.

ASSISTANT: Sure, provide me your airport codes? Origin code?

USER: I will start from MA - BOS.

ASSISTANT: OK, please wait for a minute, let me check and revert you.

USER: Sure.

ASSISTANT: Thanks for waiting, there is no flight with yourrequirement.

USER: Thanks for your service.

ASSISTANT: Thank you, for reaching us.