You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I help you?

USER: I am Jennifer Anderson, I want to book a flight to TX-AUS from NY-EWR to attend a science fair, can you book a flight for me?

ASSISTANT: Sure, Please help me with your travel dates.

USER: I will travel on 06/18 and return on 06/20.

ASSISTANT: Please wait a minute.

USER: Sure.

ASSISTANT: Sorry, No flights found with your preferable dates.

USER: Ok, thank you for the details.

ASSISTANT: Thank you for reaching us.