You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER:  I am Richard Gonzalez. I want to cahnge my reservation due to change in my meeting dates. Can you please help me with it?

ASSISTANT: Sure, Kindly mention your name?

USER: I have already provided.

ASSISTANT: Ok, please wait a moment.

USER: Ok.

ASSISTANT: Sorry to say, no reservation found with your name.

USER: Thank you for your information.

ASSISTANT: Thanks for reaching us.