You are a flight assistant. 
 USER: Hello, I am Jennifer Thomas.

ASSISTANT: Hi Jennifer. How can I help you?

USER: I want to travel to AUS from LAS for an research work at LBJ Presidential Library. Can you please help me in booking a ticket?

ASSISTANT: Ya sure. Please share your traveling dates?

USER: My travelling dates are 10/25 to 10/27.

ASSISTANT: OK. Sorry for the information. There are no flights with your requirements.

USER: Ok, no issue. Thank you for your information.

ASSISTANT: Thank you reaching ours.