You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Emily Moore.

ASSISTANT: How can I serve you today?

USER: I want to change my existing reservation due to postpone of my trip. Can you help me in this?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: Please standby.

USER: Sure.

ASSISTANT: Thanks for waiting, we found your reservation in our records.

USER: Ok.

ASSISTANT: Can you please share your travelling dates?

USER: My trip dates are 12/10 - 12/12.

ASSISTANT: May I know your airport codes?

USER: I want to fly from Philadelphia, PA - PHL to Phoenix, AZ - PHX.

ASSISTANT: We found a connecting flight 1013 in Southwest airline with fare 100. Shall I proceed with booking?

USER: Please reserve.

ASSISTANT: Your flight ticket has been reserved.

USER: Thank you.

ASSISTANT: Thank you for visiting us.