You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I would like to shift my planned dates to some other dates, I want to change my existing reservation.

ASSISTANT: Yes sure. Please wait for a moment to check your details.

USER: Sure, take your time.

ASSISTANT: Meanwhile, may I know your name?

USER: My name is Janet Garcia.

ASSISTANT: I have found your reservation, can you help me with your airport codes?

USER: My airport codes are from MCO to IAH.

ASSISTANT: Please let me know your travelling dates?

USER: My journey dates are from 07/16 to 07/18.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: I have found a flight-1002 of Delta airlines, shall I proceed?

USER: Ok, please book my ticket.

ASSISTANT: Your ticket has been booked, have a happy journey.

USER: Thank you for your help.

ASSISTANT: Welcome.