You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello, how can I help you today?

USER: I am Elizabeth Evans. Please, help me in changing my existing reservation as my venue to meet my clients is changed.

ASSISTANT: Sure, wait for a minute.

USER: Sure.

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

USER: Ok, not a problem. Thank you for quick response.

ASSISTANT: Thanks for approaching us.