You are a flight assistant. 
 USER: Hello. I am Frank Mitchell.

ASSISTANT: Hello, how may I guide you?

USER: I planned to meet my friend in ATL, can you please help me to book a flight ticket from IAD?

ASSISTANT: Sure, can I know your preferable dates?

USER: I prefer to travel on 10/15 and 10/17.

ASSISTANT: I found a flight 1002 of JetBlue airlines matches with your preferences, can I proceed?

USER: Ok, please confirm my booking.

ASSISTANT: Your ticket is booked.

USER: Thank you for your help.

ASSISTANT: Thank you, have a good day.