You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

USER:  I am Richard Edwards want to change my reservation due to heavy floods. Can you help me in changing?

ASSISTANT: Sure, we are here to help you. Please wait a moment.

USER: Ok.

ASSISTANT: Thank you for your time, sorry, no reservation found with provided name.

USER: Ok, no problem. Thank you for your response.

ASSISTANT: Thank you for picking us.