You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I address you today?

USER: I have planned to consult a doctor for my health check up due to more emergency operations scheduled to him, my appointment has been postponed. so, help me in changing my reservation.

ASSISTANT: Sure, I will help you.

USER: Thank you.

ASSISTANT: Can you please provide your good name for checking purpose?

USER: My name is Nicole Roberts.

ASSISTANT: Please wait for a minute, I will get back to you with current details.

USER: Sure, I will be waiting for your response.

ASSISTANT: There is no reservation found on your name in our database.

USER: No issues. Thank you for the valuable information.

ASSISTANT: Thanks for approaching us.