You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is John Green.

ASSISTANT: How can I assist you?

USER: Can you book me a ticket from SEA to BOS?

ASSISTANT: Can I know your travel dates?

USER: Sure, here are my travelling dates 12/25 and 12/27.

ASSISTANT: The flight 1024 of UA airlines is available on your requested dates. Shall I proceed?

USER: Please book the ticket.

ASSISTANT: John, your ticket is booked successfully.

USER: Thank you for the help.

ASSISTANT: You are welcome.