You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I address you?

USER: Can you please reserve me a flight ticket from PHX to IAD to go for holiday trip?

ASSISTANT: Sure, on what dates are you planning to make your trip?

USER: I am planning to depart on Sept 24 and return on Sept 26.

ASSISTANT: Will you prefer to travel in a normal cost airline or low cost airline?

USER: I am comfortable with any airline.

ASSISTANT: Do you need a way station within your route?

USER: Yes, I need.

ASSISTANT: Ok, please let me know if you need an economy class or business class.

USER: I don't have any preferences.

ASSISTANT: Please forward your name.

USER: I am Catherine Phillips.

ASSISTANT: Ok, we have an United airline with flight number 1020 available on the dates you requested and the tariff is 200. Is that okay?

USER: Yes, you can confirm it.

ASSISTANT: Your ticket has been booked and you will receive it through the mail.

USER: Thank you.

ASSISTANT: Thank you for approaching us.