You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I be your helping hand today?

USER: I want to change my existing reservation due to bad weather conditions. Can you please help me in that?

ASSISTANT: Sure, I am gleeful to help you.

USER: Thank you.

ASSISTANT: On whose name, you have made the reservation earlier?

USER: Pamela Collins here.

ASSISTANT: Ok, please standby.

USER: Sure.

ASSISTANT: Thank you for waiting, no reservation was found on your name to change.

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

ASSISTANT: Thank you for approaching us.