You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: I'm Margaret Lewis.

ASSISTANT: Nice to meet you.

USER: My business meeting has been postponed. So, I would like to change my reservation. Can you please help me with that?

ASSISTANT: Sure, please give me a moment.

USER: Sure, take your time.

ASSISTANT: Thanks for waiting, there is no reservation found under your name.

USER: Ok, no issues. Thank you for checking.

ASSISTANT: Welcome, have a great day.