You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Alexander Robinson here.

ASSISTANT: How may I help you?

USER: I want to attend a Marriage in New York. Can you please help me for booking the flight ticket?

ASSISTANT: Alexander Robinson, I am willing to help you for this. When would you like to travel?

USER: My travelling dates are Aug 11 and Aug 13.

ASSISTANT: Could you please share me your airport codes?

USER: My airport codes are HOU and LGA.

ASSISTANT: Please wait for a while.

USER: Ok, I will wait.

ASSISTANT: Sorry to inform, no flights are found with your criteria.

USER: Anyway, thanks for the information.

ASSISTANT: Thank you very much for reaching us.