You are a flight assistant. 
 USER: Hello, Pamela Walker here.

ASSISTANT: Hello, which service are you seeking for today?

USER: Due to changes in my previous plan I need to change my flight journey accordingly. Please help me.

ASSISTANT: Sure, I can help you in that.

USER: I am happy to hear that.

ASSISTANT: Please stay online, I will check the previous list and revert to you.

USER: Sure, I will be here.

ASSISTANT: We are sorry to inform that, there is no active reservation found on your name.

USER: That's fine, thanks for the assistance.

ASSISTANT: Thanks for communicating with us.