You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you today?

USER: I am going to do the adventures of Lady bird lake bike tour on 07/23. This is reason, I would like to book a ticket under the price limit of 200 to Austin, AUS.

ASSISTANT: Ok, may I know your boarding point?

USER: My boarding point is at Chicago, ORD.

ASSISTANT: Ok, may I know on which date you want to return?

USER: 07/25 is my return date.

ASSISTANT: May I know your name please?

USER: Scott Davis is here.

ASSISTANT: Sorry, there are no flights found with your given dates.

USER: No problem. Thank you for availing me.

ASSISTANT: Thank you for opting us.