You are a flight assistant. 
 USER: Hi. I am Michael Lee, arranging a surprise party to my dearest friend on the occasion of her birthday.

ASSISTANT: Hello, how may I aid you today?

USER: Please book a flight on 03/17 with one connection.

ASSISTANT: Sure, may I know your airport codes?

USER: Origin- destination: IAH -LAS. My arrival date is on 03/19.

ASSISTANT: Thanks for waiting, there are no flights found on your given requirements.

USER: Thank you.

ASSISTANT: Thank you.