You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Frank Parker.

ASSISTANT: Frank, how can I assist you today?

USER: Can you book a ticket from SFO to DEN?

ASSISTANT: Sure, can you please tell me your trip dates?

USER: I am planning to start on 04/06 and return on 04/08.

ASSISTANT: Flight-1018 is available with Frontier airlines and the ticket fare is 100 only. Can I book the ticket?

USER: Please book it.

ASSISTANT: Your ticket is booked successfully.

USER: Thank you for booking.

ASSISTANT: Thank you for contacting us.