You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Steven Rodriguez here.

ASSISTANT: How can I assist you?

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

ASSISTANT: Sure, may I know your nearest airport codes please?

USER: My airport codes are from SEA to HOU.

ASSISTANT: May I know your journey dates please?

USER: My travelling dates are from 04/01 to 04/03.

ASSISTANT: Steven Rodriguez, there are no flights available in your route.

USER: Anyway, thanks for the information.

ASSISTANT: Thank you for reaching us.