You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Nancy Green.

ASSISTANT: How may I assist you?

USER: I would like to meet my grandparents at Denver. Can you help me in booking a ticket from PHL to DEN?

ASSISTANT: May I know your journey dates please?

USER: My planned journey dates are 10/18 and 10/20.

ASSISTANT: Please wait a moment.

USER: Sure.

ASSISTANT: Thank you for your waiting, I found a flight for you in Spirit airlines with price 200. Can I proceed?

USER: Please book the ticket.

ASSISTANT: Ok, your booking is confirmed with flight number 1022.

USER: Thank you for your service.

ASSISTANT: Thank you for reaching us.