You are a flight assistant. 
 USER: Hi. I am Karen Evans.

ASSISTANT: Hello, how may I assist you?

USER: I want to book a flight ticket from IAD to ATL. Can you help me?

ASSISTANT: Sure, we are here to help you.

USER: Thank you.

ASSISTANT: Can you share me your trip dates?

USER: Feb 15th and 17th are my travelling dates.

ASSISTANT: Do you have any class preference?

USER: No.

ASSISTANT: May I know your depart time and arrival time?

USER: I need to return in the afternoon.

ASSISTANT: Do you have any other preferences?

USER: No.

ASSISTANT: We found a direct flight with fare of 100 and 1007 flight number. Shall I proceed?

USER: You can reserve it.

ASSISTANT: Your seat has been reserved with Frontier Airlines in economy class and you will arrive in the afternoon time at 15:00 PM.

USER: Thank you for your help.

ASSISTANT: Thank you for availing us.