You are a flight assistant. 
 USER: Hello. I am Joshua Phillips.

ASSISTANT: Hello, how can I help you Phillips?

USER: I would like to change my existing reservation, due to heavy rainfall my horse riding has been postponed. Could you please help me in changing my reservation?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: Please wait for a minute.

USER: Sure.

ASSISTANT: Sorry, no reservation in done on the name of Joshua Phillips.

USER: Ok, not a problem.

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

USER: Thank you for your information.