You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

USER: I planned to meet my friend in ATL, can you please help me to book a flight ticket from DEN?

ASSISTANT: Sure, please share me your trip dates.

USER: I prefer to travel on Mar 24 and Mar 26.

ASSISTANT: Do you need direct flight or connecting flight?

USER: I prefer to travel in a connecting flight.

ASSISTANT: For booking, we need your good name. Please mention it.

USER: I am Rachel Miller.

ASSISTANT: Is there any time concern for you?

USER: No.

ASSISTANT: May I know your class preferences?

USER: No.

ASSISTANT: We found a Frontier airline and 1021 is flight number with a fare of 300. Shall I proceed?

USER: Ok, please confirm my booking.

ASSISTANT: Your ticket is confirmed with an economy class.

USER: Thank you for your help.

ASSISTANT: Thank you for opting us.