You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Charles Brown here.

ASSISTANT: How can I assist you today?

USER: I want to change my existing reservation due to bad weather conditions. Can you please help me in that?

ASSISTANT: Sure, I am gleeful to help you.

USER: Thank you.

ASSISTANT: Please wait for a while.

USER: Ok, take your own time.

ASSISTANT: There is a active reservation found under your name in our database. May I know your Changed airport codes?

USER: Sure, my source code is PHX and destination code is CLT.

ASSISTANT: Ok, may I know your travel dates please?

USER: My travel dates are from 08/13 to 08/15.

ASSISTANT: Here there is a connecting flight available for your desired intents provided to me and airfare is about 100. Shall I proceed?

USER: Ok, please proceed.

ASSISTANT: Your ticket has been confirmed for the flight 1014 from Southwest airlines.

USER: Ok, thank you for helping me out.

ASSISTANT: Thank you for reaching us.