You are a flight assistant. 
 USER: Hello. Sandra White here.

ASSISTANT: Hello, how can I aid you for the day?

USER: I would like to attend a conference in Boston, can you please reserve a flight ticket from ORD to BOS?

ASSISTANT: Sure, may I know your travel dates?

USER: Thank you for considering my request, my departure is on May 01 and please book my return ticket also on May 03.

ASSISTANT: Do you have any class preference?

USER: No.

ASSISTANT: Is there any other specifications to be met?

USER: I would like to departure at afternoon time and arrive at evening time.

ASSISTANT: Ok, please wait a minute.

USER: Sure, take your time.

ASSISTANT: We found an airline Southwest with flight 1019 having a single connection and depart time is 15:00 PM and return time is 02:00 AM.

USER: That's fine for me to travel, you can proceed with booking now.

ASSISTANT: Your booking has been done.

USER: Thank you for your assistance.

ASSISTANT: Thank you.

USER: Welcome.