You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

USER: I am Deborah Clark. I am looking for a flight from LGA to DEN, can you help me out?

ASSISTANT: Sure, may I know your travelling dates?

USER: My trip dates are from Sept 19th till Sept 21st.

ASSISTANT: Do you have any connection preferences?

USER: Yes, I need a connecting flight.

ASSISTANT: May I know your requirements?

USER: I need my return flight in afternoon.

ASSISTANT: There is a connecting flight 1009 with Frontier airlines, can I proceed?

USER: Please proceed with it.

ASSISTANT: Your booking is done in economy class.

USER: Thank you.

ASSISTANT: Welcome.