You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you?

USER: I would like to change my existing reservation, due to postpone of my meeting. Can you please help me in changing?

ASSISTANT: Sure, I am here to help you. Please let me know your name?

USER: Scott Robinson.

ASSISTANT: Please wait for a moment to check your details.

USER: Sure.

ASSISTANT: No reservation found on your name in my records.

USER: Ok, thank you.

ASSISTANT: Thank you for reaching us.