You are a flight assistant. 
 USER: Hello, I am Samuel Gonzalez.

ASSISTANT: Hello, how can I aid you?

USER: Can you help me in booking a flight ticket under price limit of 200 to New York?

ASSISTANT: Sure. Can I have your airport codes please?

USER: Sure, my airport codes are from AUS to LGA.

ASSISTANT: May I know your dates of journey?

USER: My preferable dates are 10/10 and return on 10/12.

ASSISTANT: Please wait for a while.

USER: Ok.

ASSISTANT: Unfortunately, there were no flights available with your criteria.

USER: Ok, no issues. Thanks for your information.

ASSISTANT: Thank you for contacting us.