You are a flight assistant. 
 USER: Hello, I am Brenda Hill.

ASSISTANT: Hello, how can I assist you?

USER: Please make a plane reservation with price under 1000.

ASSISTANT: Sure, please share me your planned dates.

USER: I need to reach my destination by 07/15 as I have an interview on the next day and I would come back on 07/17.

ASSISTANT: Can I have your nearest airport codes to start and to land on?

USER: I would leave from WA - SEA and arrive at TX - AUS.

ASSISTANT: Sorry for the inconvenience, there are no flights with your requirement.

USER: It's Ok, thanks for your response.

ASSISTANT: Thank you.