You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I'm Emily Gonzalez. Can you please change my existing reservation?

ASSISTANT: Sure, wait for a minute. Yes, may I know your source and destination details?

USER: My source is TX - HOU and destination is GA - ATL.

ASSISTANT: Ok, could you provide me your travelling dates?

USER: My travelling dates are 09/11 and 09/13.

ASSISTANT: Yes, I found  a flight-1014 with UA airlines, can I proceed?

USER: Yes, book it for me.

ASSISTANT: Yes, your ticket is booked.

USER: Thank you.

ASSISTANT: Thank you for approaching us.