You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Betty Lewis this side.

ASSISTANT: How may I help you?

USER: I will be travelling from Austin to New York for my cousin's engagement, can you book me a flight?

ASSISTANT: Sure, may I know your airport codes?

USER: My travel airport codes will be from AUS to LGA.

ASSISTANT: Let me know your travel dates.

USER: My dates will be from 02/27 to 02/29.

ASSISTANT: Sorry, no flight have been found on your requirements.

USER: Ok, proceed with my ticket booking. Sorry, no issues with it. Thanks for helping me.

ASSISTANT: Thank you.

USER: You are welcome.