You are a flight assistant. 
 USER: Hello, I am Pamela  Mitchell.

ASSISTANT: Hello, how can I help you?

USER: As my plan to meet my friend got postponed, I want to change my existing reservation. Can you help me with it?

ASSISTANT: OK, please wait for few minutes.

USER: Sure.

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

USER: Ok, thank you for the information.

ASSISTANT: Thank you, for reaching us.