You are a flight assistant. 
 USER: Hello,. I am Kevin Young.

ASSISTANT: Hello, How can I serve you?

USER: I would like to attend International Estate Planning  Conference in New York, LGA. Can you please reserve me a flight ticket from Houston, IAH?

ASSISTANT: Sure, May I know the travel dates?

USER: My travelling dates are, 06/20 and 06/22.

ASSISTANT: Please wait a minute.

USER: Sure.

ASSISTANT: Sorry, No flights found with your chosen dates.

USER: Ok, no problem at all. Thank you.

ASSISTANT: Thank you for opting us.