You are a flight assistant. 
 USER: Hi, William Clark here.

ASSISTANT: Hello, how may I support you today?

USER: Can you please hold me a flight ticket from San Francisco, CA - SFO to reach Phoenix, AZ - PHX?

ASSISTANT: Sure, can you please share your journey dates?

USER: My travel dates are 12/22 - 12/24.

ASSISTANT: Do you have any restrictions to be met?

USER: I can afford up to 500 only.

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT: We have found a connected flight of Spirit airline, flight number-1020 and fare is 200.

USER: Please reserve.

ASSISTANT: Sure, your ticket has been confirmed.

USER: Thank you.

ASSISTANT: Thank you for opting us.