You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I aid you today?

USER: As my meeting with my manager got postponed, I would like to change my existing reservation which was reserved on the name of Ruth Hill. Can you help me with it?

ASSISTANT: Sure, please wait for a moment, I will check and get back to you.

USER: Sure.

ASSISTANT: Sorry, there was no reservation found with your name.

USER: That's ok, thank you for your response.

ASSISTANT: Thank you for opting us.