You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you?

USER: Could you please help me to book a flight ticket to LAX from PHX within the fare of 500?

ASSISTANT: Sure, I will help you in booking the ticket. May I know your travelling dates please?

USER: My travelling dates are July 18 and July 20.

ASSISTANT: According to your information, I have found a flight with single stop over in your journey with a minimum fare of 100 with flight number 1002. Shall I proceed with this flight?

USER: Yes, proceed.

ASSISTANT: Your booking is done.

USER: Thank you.

ASSISTANT: Most welcome.