You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you for today?

USER: Ruth Edwards here. I am a movie director, I have to meet my producer to discuss about our new movie. Could you book my ticket from PHX to SFO?

ASSISTANT: Sure, I will be help you with that. Can you please provide your planned dates of your journey?

USER: My itinerary dates are 05/24 and 05/26.

ASSISTANT: Please wait for sometime, while I will check for the flight availability.

USER: Sure.

ASSISTANT: Do you have any requirements about your price limit?

USER: I can afford 500 for my ticket.

ASSISTANT: Ok, please let me check the flight accordingly.

USER: Ok.

ASSISTANT: Sorry to say this Ruth, there are no flights with such a price limit which can travel to your route.

USER: It's ok, thank you.

ASSISTANT: You are welcome, thank you for opting our service. Hope you have a nice day ahead.