You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I serve you at this moment?

USER: Samuel Garcia here. Due to inconvenience of my work, I want to change my reservation. Can you please help me for that?

ASSISTANT: Sure, please wait for few minutes.

USER: Ok.

ASSISTANT: There is no recent reservation found on your name in our records.

USER: Anyway, thanks for the information.

ASSISTANT: Thank you for reaching us.