You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, do you need any help from us?

USER: Can you please help me to book a flight from PHX to DEN?

ASSISTANT: Sure, could you please share your departure and arrival day?

USER: Sure, I want to depart on July 1 and need to return on July 3.

ASSISTANT: Ok, could I have your name please?

USER: My name is Cynthia Lee.

ASSISTANT: Ok, do you need direct or connecting flight?

USER: I am ok with any flight.

ASSISTANT: Ok, do you have any other specifications?

USER: I prefer an economy class to travel.

ASSISTANT: The economy class with flight number 1015 of United airline is available having fare as 100 and connection as 1, is it ok for you?

USER: Ok, please proceed for booking.

ASSISTANT: Ok, your reservation is confirmed. The departure time is 23:00 hours and the arrival time is 16:00 hours.

USER: Thank you.

ASSISTANT: You are welcome, have a great day.