You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you?

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

ASSISTANT: Sure, I can help you with booking. Can I know your airport codes please?

USER: My airport codes are LGA and SEA.

ASSISTANT: Can I know your journey dates?

USER: My travelling dates are Apr 03 and Apr 05.

ASSISTANT: Are you okay with connecting flight or you need any direct flight?

USER: I prefer single connecting flight.

ASSISTANT: Would you like to travel in a business class or in an economy class?

USER: It's not an issue.

ASSISTANT: Can I know your name please?

USER: My name is Michael Evans.

ASSISTANT: Sorry, there is no flight obtained on your travel dates to book a ticket.

USER: Anyway, thanks for the information.

ASSISTANT: You are welcome and have a great day.