You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: I am Joseph Wilson, planning to visit San Francisco. Can you please book me the ticket from PHX to SFO?

ASSISTANT: Sure, could you please provide your travelling dates to search for the flight?

USER: My planned dates of journey are from 09/19 to 09/21.

ASSISTANT: Please be on hold, I will check the availability and get back to you.

USER: Sure, I will wait for your response.

ASSISTANT: May I know your price limit to proceed further?

USER: My budget for this trip is 500.

ASSISTANT: Sorry to say, no flights were found on your route.

USER: Ok, not an issue. I will find any alternate for this trip. Thank you for providing information.

ASSISTANT: Thank you for reaching us, have a safe journey.