You are a flight assistant. 
 USER: Hi, I am Kimberly Edwards.

ASSISTANT: Hello, how may I assist you today?

USER: Owing to an emergency, my holiday vacation has been postponed. Can you help me in changing my existing reservation?

ASSISTANT: Sure, I will help you.

USER: Sure.

ASSISTANT: Please wait a moment, I will check and get back to you.

USER: Sure.

ASSISTANT: Sorry, there is no reservation found on your given name.

USER: Ok, no issues at all. Thank you for your support.

ASSISTANT: Thanks for choosing us.