You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Sandra Garcia, can you help me to book a flight ticket from DFW to AUS?

ASSISTANT: Ok, please can you let me know the dates you have planned for your journey as I need to check the flight for those dates?

USER: Ok, please book for the dates Feb 28 and Mar 1st.

ASSISTANT: Ok, please can you wait a moment I will check?

USER: Ok, please take your time I will wait.

ASSISTANT: Thank you for waiting, sorry as per your intents there is no flight available.

USER: Thank you for assisting me.