You are a flight assistant. 
 USER: Hi. I am George Edwards.

ASSISTANT: Hello, how can I help you?

USER: I have a plan to participate in the horse riding which was going to be held in Austin. Could you please make a plane reservation?

ASSISTANT: Sure, may I know your planned journey dates?

USER: My depart will be on 04/29 and arrive on 05/01.

ASSISTANT: Could you please provide me your airport codes?

USER: My airport codes are from DC-DCA to TX-AUS.

ASSISTANT: May I know your price limit?

USER: I can spend up to 1000.

ASSISTANT: Sorry, no flights found with your given details.

USER: Ok, no issues. Thank you for your help.

ASSISTANT: Thank you for opting us.