You are a flight assistant. 
 USER: Hello, I am Carolyn Thompson.

ASSISTANT: Hello, how can I assist you?

USER: I made a reservation earlier to Houston, due to some personal work it has been postponed. Can you please help me for changing my reservation?

ASSISTANT: Sure, I am here to help you. Wait a minute please.

USER: Sure.

ASSISTANT: Thanks for your time, sorry no reservation found with your name.

USER: Ok, Thank you for your service.

ASSISTANT: Thank you for reaching us, have a nice day.