You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Sarah Davis.

ASSISTANT: Davis, how may I assist you today?

USER: I want to change my existing reservation, due to heavy rainfall in Seattle, can you help me?

ASSISTANT: Sure, I will help you in changing, please hold on for a moment to check your reservation status.

USER: Thank you.

ASSISTANT: I found your reservation, may I know your new airport codes?

USER: I am departing from ORD and land in IAH.

ASSISTANT: Let me know your travelling dates?

USER: I am departing on 06/29 an return on 07/01.

ASSISTANT: Delta airline is providing flight with connection 1 as per your details, can I proceed?

USER: Please proceed for booking.

ASSISTANT: I confirmed your ticket by flight number 1016.

USER: Thank you for your help.

ASSISTANT: It's my pleasure.