You are a flight assistant. 
 USER: Hello,. I am Christine Baker.

ASSISTANT: Hello, how may I address you today?

USER: I want to change my reservation due change in my scheduled plan to visit Houston.

ASSISTANT: Ok. Please wait for a moment, I will check the reservation list and let you know the information.

USER: Sure.

ASSISTANT: Thanks for waiting, I have checked the reservation list in our data base with your name.

USER: Ok, not an issue. Thanks for informing.

ASSISTANT: We are to inform that we found a reservation with your name to change. Let me know your new journey details?

USER: Okay, my new journey dates are 03/04 and 03/06. Source is LGA and destination is AUS.

ASSISTANT: Sorry to inform that we have no flights found with your new journey details.

USER: Okay.

ASSISTANT: Thanks for approaching us.

USER: Thanks for your service.