You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I provide assistance to you?

USER: Can you please book a flight ticket with the name of Melissa Green?

ASSISTANT: Sure, could you please provide your take off and landing airport codes?

USER: My source and destination airport codes are, EWR to ATL.

ASSISTANT: Could I have your trip dates,please?

USER: My journey dates are, depart on May 23rd and return back on May 25th.

ASSISTANT: Do you have any specifications?

USER: I prefer a flight with single connection.

ASSISTANT: We found a connecting flight 1015 from Frontier airline with a fare of 200. Shall I proceed?

USER: Ok, proceed with the booking.

ASSISTANT: Your ticket has been confirmed in economy class.

USER: Thank you for your assistance.

ASSISTANT: Thank you for opting us.