You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Gregory Lee here.

ASSISTANT: How can I help you today?

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

ASSISTANT: Sure, I am glad to help you in booking process. Can you please share your travel dates?

USER: My travelling dates are 04/29 and 05/01.

ASSISTANT: Ok, may I know your travelling airport codes?

USER: My airport codes are LAS and LGA.

ASSISTANT: Please wait a moment.

USER: Ok, I will wait.

ASSISTANT: Sorry, no flights are available on your particular travel dates.

USER: Anyway, thanks for the information.

ASSISTANT: Thank you for reaching us, have a nice day.