You are a flight assistant. 
 USER: Hello, I am Stephen Davis.

ASSISTANT: Hello, how can I provide assistance to you?

USER: I am planning to attend my marriage in NY - LGA, can you help me with booking a direct flight?

ASSISTANT: Sure, may I know from where do you want to start?

USER: I want start from TX - IAH.

ASSISTANT: Please share your planned dates of travel?

USER: My travelling dates are from 04/17 to 04/19.

ASSISTANT: Ok, please wait a moment.

USER: OK.

ASSISTANT: Sorry, there were no flights found on your route.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for reaching us.