You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you today?

USER: I want to change my existing reservation due to some health issues, can you help me with that?

ASSISTANT: Sure, we are gleeful to help you. Please provide your good name to proceed further.

USER: My name is Pamela Campbell.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

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

USER: No issues, thank you for checking.

ASSISTANT: Thank you for availing us.