You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I serve you today?

USER: I am Samantha Taylor. Could you please help me to change my reservation?

ASSISTANT: Sure, please wait a moment to check the reservation status.

USER: Sure.

ASSISTANT: Thank you for waiting. Sorry to inform you that there is no reservation by this name.

USER: Ok, thank you for information.

ASSISTANT: Thank you for approaching us.