You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: I want to change my existing reservation due to bad weather conditions at my source. Can you please help me with this?

ASSISTANT: Sure, we are here to help you. May I know your name?

USER: Sure, my name is Brandon Martinez.

ASSISTANT: Ok, wait for some time I will check and get back to you.

USER: Sure.

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

USER: Ok, not an issue. Thank you for checking.

ASSISTANT: Thanks for approaching us.