You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you today?

USER: I am Gregory Lee. I want to book a ticket from SEA to OAK to meet my grandparents, can you help me in booking?

ASSISTANT: Lee, can you please provide me know journey dates?

USER: I am departing on 04/29 and return on 05/01.

ASSISTANT: Ok, let me check for the available flights.

USER: Ok.

ASSISTANT: There is a flight-1021 available in Spirit airlines and the ticket costs you 200 only. Can I book the ticket?

USER: Please proceed for booking.

ASSISTANT: Your ticket is booked successfully and have a nice day.

USER: Thank you for your help.

ASSISTANT: Thank you for choosing us.