You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: Ruth Hernandez here.

ASSISTANT: Ok.

USER: I was made a reservation earlier in this week. But I want to change my reservation. Can you please help me for that?

ASSISTANT: Sure, please be on hold.

USER: Ok, I will wait.

ASSISTANT: There is no reservation found under your name to do changes in that.

USER: Anyway, thanks for the information.

ASSISTANT: Thank you for choosing us.