You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: As my appointment with my lawyer has been changed as the lawyer is very busy with his schedule. Can you please aid me in changing my travelling dates?

ASSISTANT: Ok, I am here to help you. Meanwhile may I know your name please?

USER: I am Matthew Hernandez.

ASSISTANT: Please wait for a while I will check and let you know.

USER: Sure, you can take your own time.

ASSISTANT: Sorry, I did not find any active reservation on your name to change.

USER: Not an issue, thank you for your assistance.

ASSISTANT: Thank you for reaching us.