You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Nicholas Carter.

ASSISTANT: How can I help you?

USER: I want to attend a business meeting at ORD, can you please reserve me a flight ticket from DEN?

ASSISTANT: Sure, May I know your travelling dates?

USER: My travelling dates are from Feb 25th to Feb 27th.

ASSISTANT: Do you have any connection limit?

USER: Yes, I want a single connection.

ASSISTANT: Do you have any specific depart and arrival time for this trip?

USER: Yes, I want to depart in the morning and return in the afternoon.

ASSISTANT: Is there any class preference?

USER: No.

ASSISTANT: We found a connecting flight 1021 in American airline which departs at 4:00Am and return at 14:00PM and fare is 100, Shall I proceed?

USER: Yes, please proceed.

ASSISTANT: Your ticket has been confirmed in economy class.

USER: Thank you.

ASSISTANT: Thank you.