You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Emily Adams.

ASSISTANT: How can I help you today?

USER: Can you please help me in changing existing reservation as my meeting got postponed?

ASSISTANT: Sure, I am here to help you with that.

USER: Thank you.

ASSISTANT: Just give a moment.

USER: Ok.

ASSISTANT: Sorry, there is no reservation on your name in our database.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for reaching us.