You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, do you need any help from us?

USER: I am John Mitchell. Can you please book a flight ticket from IAD to OAK?

ASSISTANT: Sure, could you please share your departure and arrival day?

USER: Sure, I need to travel on dates of 12/02 and 12/04.

ASSISTANT: The Spirit airline with flight number 1021 is available having fare as 100 and connection as 1, is it ok for you?

USER: That is fine, please proceed with booking.

ASSISTANT: Ok, your reservation is confirmed.

USER: Thank you for your help.

ASSISTANT: You are welcome, have a great day.