You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

USER: I am Daniel King. Can you help me in booking from PHX to DEN?

ASSISTANT: Sure, when do you want to travel?

USER: My travelling dates are from Apr 7 to Apr 9.

ASSISTANT: Ok, Do you prefer business class or economy class?

USER: I am comfortable with any class.

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT: Thank you for your patience, There is a flight found in 1024 UA airlines with a fare of 200. Can I proceed?

USER: Ok, proceed.

ASSISTANT: Sure, your ticket has been booked.

USER: Thank you.

ASSISTANT: Thank you for choosing us.