You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you?

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

ASSISTANT: Sure, I am here to help you. Can you please share your trip dates?

USER: My travelling dates are May 07 and May 09.

ASSISTANT: May I know your airport codes?

USER: My airport codes are LGA and DEN.

ASSISTANT: Do you have any class preferences?

USER: I want to travel in economy class.

ASSISTANT: Do you need direct flight or connection flight?

USER: I need single connecting flight.

ASSISTANT: May I know your name?

USER: My name is Anthony Mitchell.

ASSISTANT: Sorry, there are no flights found on your travelling dates.

USER: Anyway, thanks for the information.

ASSISTANT: Thank you for choosing us.