You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: I am Jack Thomas. I planned a trip with my friends on 01/17 and 01/19. Can you help me in booking the ticket?

ASSISTANT: Sure, can you please provide the airport codes?

USER: My airport codes are PHX and DCA.

ASSISTANT: Ok, let me check for the availability of flight.

USER: Ok.

ASSISTANT: Jack, there is a flight available at your request with price 100.

USER: Please book my ticket.

ASSISTANT: Your booking is confirmed. Your flight number is 1009 with Frontier airline.

USER: Thank you for your help.

ASSISTANT: You are welcome. Thank you for contacting us.