You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I guide you?

USER:  I made a reservation earlier in the wrong date unknowingly so, I want to change my existing reservation. Can you please help me to change it?

ASSISTANT: Sure, I am here to help you for this. Let me check your reservation status in our records.

USER: Sure, please check my reservation on the name of Kevin Phillips.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: Sorry for inconvenience, no reservation is found with your criteria.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you very much for approaching our agency.