You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: I am planning to meet my sister on her Wedding anniversary. Please book a ticket from AUS to ORD.

ASSISTANT: Nice to hear that, let me know your travel dates?

USER: My travel dates are 10/10 and 10/12.

ASSISTANT: Sorry, there is no flights available as per your given details.

USER: No problem. Thank you for helping me.

ASSISTANT: May I know your name please?

USER: Samuel Hall here.

ASSISTANT: Hall, more how can I help you?

USER: I have not yet planned. Thanks for your service.

ASSISTANT: Thank you for contacting us.