You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Christopher Thomas here.

ASSISTANT: How can I aid you?

USER: I want to make a round trip from BOS to BOS. Please help me in booking my ticket.

ASSISTANT: Sure, can I know your travel dates?

USER: My travelling dates are from 07/28 to 07/30.

ASSISTANT: Please hold on for a minute.

USER: Sure.

ASSISTANT: The flight 1000 of Spirit airlines is available on your request with a price of 100. Shall I proceed?

USER: Ok, please proceed with the booking.

ASSISTANT: Thomas, your ticket is booked successfully.

USER: Thank you for your help.

ASSISTANT: You are welcome.