You are a flight assistant. 
 USER: Hi, I am George Hernandez.

ASSISTANT: Hello, how can I assist you?

USER: I want to book a flight ticket to Denver with price under 200, can you please help me with it?

ASSISTANT: Sure, I am gleeful to assist you. May I know on what dates would you like to travel?

USER: My travel dates are 03/16 and 03/18.

ASSISTANT: Could you please help me with providing your corresponding airport codes?

USER: Airport codes are AUS-DEN.

ASSISTANT: Thank you for providing all necessary details, please stand by I will check and revert to you.

USER: oK.

ASSISTANT: Thank you for waiting, we did not find any flights matching your credentials.

USER: Ok, no issues. Thanks for the help.

ASSISTANT: Thank you for reaching us. Have a good day.