You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Donald Scott.

ASSISTANT: How can I help you?

USER: I am looking for a flight from ORD to AUS, can you help me?

ASSISTANT: May I know your travel dates?

USER: My travelling dates are 19 and 21 of Oct.

ASSISTANT: Do you have any preferences?

USER: I would like to depart in the evening and with a connecting flight.

ASSISTANT: Sorry, we couldn't found any flights for you.

USER: It's ok, not a problem. Thank you.

ASSISTANT: Thank you for reaching us.