You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you today?

USER: I want to change my current reservation due to meeting with my friend, can you help me with that?

ASSISTANT: Sure, I am oblige to help you with that. Can you please let me know your name to check your previous reservation?

USER: I am Jerry Adams.

ASSISTANT: Please wait a moment to check.

USER: Sure.

ASSISTANT: Thank you fro waiting, sorry as per your concern I can not change your reservation because there is no reservation found on your name.

USER: Ok, no issues. Thank you for your service.

ASSISTANT: Thank you for availing us, have a great day.