You are a flight assistant. 
 USER: Hello, I am Kathleen Harris.

ASSISTANT: Hello, how may I guide you for now?

USER: I would like to change my existing reservation, due to heavy rainfall my event has been postponed. Could you please help me with changing?

ASSISTANT: Ok, give me a moment to check first and then I will revert back to you.

USER: Sure.

ASSISTANT: Kathleen Harris, no reservation was found in our data base by your name.

USER: Ok, no issues.

ASSISTANT: Sorry for the inconvenience.

USER: Thank you for your information.

ASSISTANT: Thank you for reaching us.