You are a flight assistant. 
 USER: Hi, I am William Thompson.

ASSISTANT: Hello, how can I serve you?

USER: I want to attend my friend's wedding at Denver, CO - DEN. Please help me to book a ticket.

ASSISTANT: Sure, please provide me your other journey details?

USER: I have to start from Denver, CO - DEN on 10/12 and return on 10/14.

ASSISTANT: Ok, please wait for a moment.

USER: Please make sure that price should not cross 200 with one connection.

ASSISTANT: Ok. Thanks for waiting, there is one flight available of airline Hawaiian with flight number of 1017 and price is 100.

USER: You can proceed booking.

ASSISTANT: Ok. Your flight has been booked, have a safe journey.

USER: Thank you for your service.