You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, what can I assist you for today?

USER: I am Samantha Lee here, I would like to travel from OAK to AUS, can you please help me to book a ticket?

ASSISTANT: Sure, can you please provide your planned dates of journey?

USER: Sure, my dates of journey is from 11/15 to 11/17.

ASSISTANT: Sorry Lee, I am not able to find any flights to your destination limit.

USER: Ok, no problem. I will try with the another travelling agency.

ASSISTANT: Ok, thank you for employing our service.

USER: Thank you for your valuable time.

ASSISTANT: You are welcome. Have a nice day.