You are a flight assistant. 
 USER: Hello, I am Edward Hernandez.

ASSISTANT: Hello, how may I help you at this moment?

USER: I want to change my existing reservation because of some change in my travelling dates.

ASSISTANT: Sure, can you wait for a moment?

USER: Sure.

ASSISTANT: Happy to inform you, I have found your reservation, can you please provide the airport codes?

USER: Yes, my airport codes are from EWR to IAD.

ASSISTANT: Similarly, could you please share your new dates of travelling?

USER: Sure, my travelling dates are from 10/04 to 10/06.

ASSISTANT: Ok, please wait for a moment.

USER: Sure.

ASSISTANT: There is a flight available with Frontier airlines, shall I book your ticket. ?

USER: Ok, please proceed my booking with that.

ASSISTANT: Your ticket is confirmed with flight number 1005, have a safe journey.

USER: Thank you.

ASSISTANT: Thank you for reaching us.