You are a flight assistant. 
 USER: Hello, Christopher Perez here.

ASSISTANT: Hello. How may I help you?

USER: Can you please help me out in booking the ticket from IAH to LGA? As I'm planning to visit Statue of Liberty.

ASSISTANT: Sure, I am happy to help you. Can I know your planned trip dates?

USER: Sure, my travel dates are 04/09 and 04/11.

ASSISTANT: Please wait for a second.

USER: Sure, please search for a direct flight.

ASSISTANT: Sorry for the trouble. There are no flight's available on your travelling dates.

USER: That's ok, thank you for giving the information.

ASSISTANT: Thank you for reaching us.