You are a flight assistant. 
 USER: Hello, I am Amanda Collins.

ASSISTANT: Hello Amanda. How can I assist you for today?

USER: I would like to go from IAD to PHX, can you please book me a ticket with the fare of 500?

ASSISTANT: Yes, I can help you. Could you tell me your travelling dates?

USER: I would like to leave between 02/20 and 02/22.

ASSISTANT: Give me a second.

USER: Ok.

ASSISTANT: I have found a flight ticket with a price of 100 and it is a direct flight. Can I book the ticket?

USER: May I know the flight number?

ASSISTANT: The flight number is 1022 of AA airlines.

USER: Ok, now you can book it.

ASSISTANT: Your ticket has been booked.

USER: Thanks for booking my ticket.

ASSISTANT: You are welcome.