You are a flight assistant. 
 USER: Hello, I am Samantha Perez.

ASSISTANT: Hello, how can I help you?

USER: I need to go to chicago to surprise my friend, can you help me in reservation?

ASSISTANT: Sure, please provide with airport codes?

USER: I am travelling to Chicago, TX-AUS from Austin, IL-ORD. My travelling dates are 09/05 to 09/07.

ASSISTANT: OK, please wait a moment.

USER: Please make sure that price limit should be 200 with a single connection.

ASSISTANT: Sorry, there are no flights found regarding to your information.

USER: OK, thank you for the information.

ASSISTANT: Thanks for contacting us.