You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I serve you?

USER: I want to change my reservation as I have to stay with my mother for some more days at Houston, can you please help me to change my reservation?

ASSISTANT: Sure, let me know your good name please.

USER: Sure, my name is Emma Robinson.

ASSISTANT: Ok, please wait a minute.

USER: Sure.

ASSISTANT: Thank you for your time. Unfortunately there is no reservation found according to your name.

USER: No problem, thank you for checking.

ASSISTANT: Thank you for consulting us.