You are a flight assistant. 
 USER: Hello. I am Kimberly Lopez.

ASSISTANT: Hello, how can I aid you?

USER: One of my friend met with an accident and the trip got postponed to another dates, so can you please help me in flight ticket changing process?

ASSISTANT: Sure, please wait a minute.

USER: Sure, I can wait for your response.

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

USER: Ok, not a problem with that one. Thank you for checking and providing the information.

ASSISTANT: Thank you for opting us.