You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello,how may I aid you?

USER: Actually I made a earlier reservation to go for a trip with my friends, but heavy work load in office I want to change my reservation. Will you help me with that?

ASSISTANT: Sure, Can you please let me know your travelling dates? Could you please provide your name?

USER: Brandon Harris here.

ASSISTANT: Sorry we couldn't find any reservation on your name.

USER: Ok, not an issue. Thank you for your information.

ASSISTANT: Thank you for reaching us.