You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: My name is Helen Robinson. I would like to visit Old North Church on this Christmas. Can you help me in booking a flight ticket?

ASSISTANT: Sure, may I know your travelling details?

USER: I want to travel LAS to BOS.

ASSISTANT: Ok, can you provide me your dates?

USER: My preferable dates are from 12/25 to 12/27.

ASSISTANT: Ok, please wait for a minute.

USER: Ok.

ASSISTANT: Thank you for waiting. There is a flight 1018 of Spirit airlines available for your request. Shall I confirm your booking.

USER: Ok, please book the ticket.

ASSISTANT: Your booking is confirmed.

USER: Thank you for your response.

ASSISTANT: Thank you for reaching us.