You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Pamela Lewis here.

ASSISTANT: How can I assist you?

USER: Can you change my existing reservation to new locations?

ASSISTANT: Sure, please give me a minute.

USER: Sure, I will wait for your response.

ASSISTANT: Sorry Lewis, there is no reservation available on your name.

USER: It's ok, not an issue. Anyway thanks for your information.

ASSISTANT: You are welcome.