You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: My name is Cynthia Carter. I would like to visit The White House for a event, but due to climatic conditions, I would like to postpone my journey.

ASSISTANT: Ok, would you like to change your reservation?

USER: Yes, could you help me out.

ASSISTANT: Sure, please give me a minute.

USER: Sure, take your time.

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

USER: That's ok.

ASSISTANT: Ok. Thank you.

USER: Thank you for your time.

ASSISTANT: You are welcome.