You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello,. How may I help you?

USER: My business meeting was postponed, will you change my existing reservation? My name is Angela Thomas.

ASSISTANT: Sure, let me know your name? OK, can you provide me your travelling details and dates?

USER: My origin airport from Phoenix, AZ - PHX to Boston, MA - BOS. My travelling dates from 04/17 to 04/19.

ASSISTANT: OK, please wait a moment I will get back to you.

USER: Sure.

ASSISTANT: Thank you, for being patience and understanding. We have found a flight on your preferences.

USER: OK, let me know flight details.

ASSISTANT: Here are your details: flight-number:1004, airline: Frontier and with the connection:1. Shall, I proceed for the further process?

USER: May I know price limit?

ASSISTANT: Sure, your price limit is 100.

USER: OK, proceed my booking.

ASSISTANT: OK,. Your ticket is confirmed.

USER: Thank you, for your good service.

ASSISTANT: Thank you, for choosing us.Have a safe journey.