You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you for today?

USER: My name is Lisa Miller and I want to book the flight ticket from DFW to AUS. Can you please help me in booking the flight ticket?

ASSISTANT: Yes, can you tell me your travelling dates?

USER: My travel dates are 06/12 and 06/14.

ASSISTANT: Give me a moment.

USER: Ok, take your time.

ASSISTANT: Sorry to inform you that there are no flights found on your requested dates.

USER: Ok, thank you for the information,.

ASSISTANT: Thank you for contacting us.