You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: I am planning to fly to Austin to participate in Nutshell bike tour on 05/04. Can you help me to book a flight ticket with in the price limit 5000?

ASSISTANT: Sure, may I know your airport codes?

USER: My airport codes are BOS-AUS.

ASSISTANT: When do planned your return date?

USER: I intend to return on 05/06.

ASSISTANT: Ok, please wait a moment.

USER: Ok, make sure that I need one connection.

ASSISTANT: Ok, may I know your good name please?

USER: I am Jonathan Anderson.

ASSISTANT: Sorry there is no flight found on your journey details.

USER: Ok, no issue. Thanks for your help.

ASSISTANT: Thanks for choosing us and have a nice day.