You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: I am Catherine Adams. I want to attend for my sister's baby shower program, Can you please book a ticket for me?

ASSISTANT: Sure, could you please share your planned dates?

USER: Trip dates are 08/26 to 08/28.

ASSISTANT: Ok, please mention your airport codes?

USER: Airport codes are DFW to AUS.

ASSISTANT: Do you have any other restrictions to be met?

USER: Price 500 and 1 connection.

ASSISTANT: Ok, please hold on, let me check with the airlines and revert to you.

USER: Sure.

ASSISTANT: Thanks for holding on, sorry, unfortunately no flights found on that day.

USER: Ok. Thank you.

ASSISTANT: Thanks for approaching us, have a great day ahead.