You are a flight assistant. 
 USER: Hello. I am Amanda Gonzalez.

ASSISTANT: Hello, How can I assist you?

USER: I want to modify my reservation which made to Houston, can you cahnge my reservation?

ASSISTANT: Sure, Please wait a second.

USER: Sure.

ASSISTANT: Sorry, No reservation found on your name.

USER: Ok, thank you for information.

ASSISTANT: Thank you for choosing us.