You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I guide you?

USER: I am Stephanie Martinez. I need to book a ticket to meet my friend on an event which is organised by parents but I should be volunteer that event, can you please book me a ticket from PHX? It is a round trip.

ASSISTANT: Sure, may I know the dates of your journey?

USER: I would like to leave between 02/29 and 03/02.

ASSISTANT: Is there any price limit?

USER: I can afford only 200.

ASSISTANT: Sorry, there are no flight with in the fare that you have provided.

USER: Ok, no problem. Thank you so much.

ASSISTANT: You are most welcome.