You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Pamela Anderson here.

ASSISTANT: How can I assist you today?

USER: I want to change my travelling dates in my previous booking. Can you help me?

ASSISTANT: Sure, will you please give me a moment?

USER: Thank you for your positive response. Please let me know my booking status.

ASSISTANT: Thanks for waiting, there is no reservation found under your name.

USER: Oh! That's very sad to know. Anyways, thank you for checking.

ASSISTANT: Welcome, have a great day.

USER: You are welcome.