You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: I need to change my reservation which I have done earlier to reach Wander law but unfortunately it has closed due to heavy rains. Can you change my dates again to visit that place?

ASSISTANT: Can you please provide your name to check the previous booking?

USER: My name is Brenda Williams.

ASSISTANT: Please give me a moment, I will check it out whether your reservation existed or not.

USER: Sure.

ASSISTANT: Sorry, there is no reservation found under your name.

USER: Ok, it's fine, anyway thank you for your hand help.

ASSISTANT: Thank you for reaching us. Have a great day.