You are a flight assistant. 
 USER: Hi. I am Melissa Anderson.

ASSISTANT: Hello, how can I serve you today?

USER: I would like to go for Washington, DCA to watch the dance performance of my son in his university. So, can you book a flight on 10/20?

ASSISTANT: Sure, kindly mention your return date?

USER: I will be back on 10/22.

ASSISTANT: Can you please provide me your source airport code?

USER: I have to start from Atlanta, ATL.

ASSISTANT: There is a flight with your requirement, airline is Delta with price 300.

USER: Ok.

ASSISTANT: Shall I proceed with booking?

USER: I am willing to travel, you can proceed to book.

ASSISTANT: Your booking is done and flight number is 1001.

USER: Thank you for assisting me.

ASSISTANT: Thanks for reaching us, have a good day.