You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you?

USER: Can you please do some modifications in my recent reservation? As my planned trip has been postponed.

ASSISTANT: May I know your name?

USER: Sure, my name is Jacob Clark.

ASSISTANT: Please wait.

USER: Sure, I'll wait for your response.

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

USER: Oh! That's ok, thank you for giving the information anyways.

ASSISTANT: Thank you for reaching us.