You are a flight assistant. 
 USER: Hello, Eric Brown here.

ASSISTANT: Hello Eric Brown. How may I serve you?

USER: I am planning to attend my brother's Convocation at University of North Texas at Dallas & Fort Worth, Can you please book me a ticket?

ASSISTANT: Sure, can you please provide your scheduled dates?

USER: My starting point is Phoenix, AZ-PHX on 04/20. My destination code is TX-DFW and return is on 04/22.

ASSISTANT: Please let me know your conditions?

USER: Price should be within 5000.

ASSISTANT: Ok, we found an UA airline with 1 connection. The airfare is 100.

USER: Ok, proceed for booking.

ASSISTANT: Ok, your booking has been confirmed.

USER: Thank you for the service.

ASSISTANT: Thank you, booking a ticket with us. Have a safe journey.