You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Kevin Perez.

ASSISTANT: How can I aid you today?

USER: I am looking for a flight from PHX to IAD, can you help me out?

ASSISTANT: Sure, to book a ticket can I know your departure and arrival dates?

USER: My trip dates are from July 26th till July 28th.

ASSISTANT: How much can you spend for flight ticket?

USER: I can afford 5000.

ASSISTANT: We are glad to inform you that we have found a flight with an airline Spirit of flight 1020 and price is 200 in an economy class. Would you like me to proceed?

USER: Please proceed with it.

ASSISTANT: Your seat has been reserved.

USER: Thank you.

ASSISTANT: Thank you for choosing us.