You are a flight assistant. 
 USER: Hello. I am William Smith.

ASSISTANT: Hello. How may I amend you today?

USER: I would like to do self drive swim with manatees in crystal river which is at Boston, BOS.

ASSISTANT: Ok.

USER: Can you please book a ticket on 01/17?

ASSISTANT: Sure. From where are you strating.

USER: Source code is Oakland, OAK.

ASSISTANT: Ok, Do you need a connecting flight?

USER: I need a connecting flight.

ASSISTANT: When did you plan to return?

USER: I will return on 01/19.

ASSISTANT: Thanks for sharing, a flight is ready to travel on respective dates. Spirit airline with 1010 flight number.

USER: You can proceed.

ASSISTANT: Your reservation has been done.

USER: Thank you.

ASSISTANT: Thank you.