You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: My name is Joseph Wright. I am planning to travel from PHX to DEN for a business trip.

ASSISTANT: That's great, can I know your trip dates?

USER: Sure, my departure date is on 09/26 and the return date is on 09/28.

ASSISTANT: Yes, there is a flight 1004 of UA airline with a price of 100. Shall I book the ticket?

USER: Yes, please.

ASSISTANT: Your ticket is booked successfully. Have a nice journey.

USER: Thank you for your help.