You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Sarah Hill.

ASSISTANT: How may I help you?

USER: Can you help me in changing my recent reservation?

ASSISTANT: Sure. Wait for a while, please.

USER: Sure.

ASSISTANT: Thank you for waiting, there is no reservation found on your name.

USER: Ok, No issues. Thank you.

ASSISTANT: Thank you for approaching us.