You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I am Gary Clark, can you please help me to book a flight ticket to OAK from IAD?

ASSISTANT: Your travelling dates please?

USER: Ok, my travelling dates are 03/18 and 03/20.

ASSISTANT: There is a flight with single connection, can I  proceed for booking in 1021 flight?

USER: Ok, you can proceed.

ASSISTANT: Your booking is done in Spirit airlines.

USER: Thank you for your services.

ASSISTANT: Thank you.