You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Donna Thomas here.

ASSISTANT: How may I guide you today?

USER: I want to attend a Seminar in Chicago. Can you please help me for booking the flight ticket?

ASSISTANT: Sure, will you please mention your preferable dates of travelling?

USER: My travelling dates are 08/10 and 08/12.

ASSISTANT: Ok, may I know your origin and destination airport codes for booking?

USER: My airport codes are EWR and ORD.

ASSISTANT: Do you have any connection limit?

USER: Yes, I need single connection.

ASSISTANT: At what time are you planning to depart and return?

USER: I want to return on afternoon.

ASSISTANT: Any class preference do you have?

USER: No.

ASSISTANT: Please wait a moment.

USER: Ok.

ASSISTANT: Thank you for your information, there is a flight 1020 with a 1 drop off in AA airlines and the fare of the ticket is 600. Is it ok for you to book the ticket?

USER: Please proceed.

ASSISTANT: Ok, your ticket has been confirmed in flight number 1020.

USER: Thanks for helping me.

ASSISTANT: Thank you for reaching us.