You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Jeffrey Miller here.

ASSISTANT: How can I help you?

USER: I am looking for a flight ticket with a price below 500. Can you reserve a flight ticket?

ASSISTANT: Sure, I am oblige to help you and may I know your planned travel dates?

USER: Ok. My preferable dates for travel are 05/18 to 05/20..

ASSISTANT: May I know your nearest regional airport codes of source and destination?

USER: My airport codes for boarding the flight are LGA to PHX.

ASSISTANT: Please give me a moment. According to your information, I have found a flight with single stop over in your journey with a minimum fare of 100 is provided by UA airlines. Shall I proceed with this flight?

USER: I am happy with the airlines. You can book the flight ticket.

ASSISTANT: Ok, the flight ticket booking is done in 1004 flight number. Have a happy flight journey.

USER: Thank you.

ASSISTANT: You are most welcome and thank you for reaching us.