You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

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

ASSISTANT: Sure, may I know your good name?

USER: Thank you for the response. My name is Jack Adams.

ASSISTANT: Please wait.

USER: Ok, sure. I will wait for your response.

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

USER: Ok,  not a issue. Anyways, thank you for the information.

ASSISTANT: Thank you for choosing us.