You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Sharon Roberts.

ASSISTANT: How can I help you?

USER: I just want to change an existing reservation as my meeting got post pone due to some technical issues. Can you help me with this?

ASSISTANT: Sure, we are happy to help you. Please wait for a while.

USER: Sure.

ASSISTANT: Thanks for waiting, we did not find any active reservation on your name.

USER: Ok, not an issue. Thank you for your information.

ASSISTANT: Thank you for availing us.