You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I lend a hand to?

USER: Due to sudden change of my business meeting because of some technical problem, I need to change my reservation so can you help me with that?

ASSISTANT: Sure, I am here to help you for this. Can you please share me your name?

USER: I am Katherine Hernandez.

ASSISTANT: Please wait for a while, let me check your reservation status in our database.

USER: Sure.

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

USER: Ok, no issues.

ASSISTANT: Thank you very much for contacting our agency.

USER: Thanks for the information.

ASSISTANT: You are welcome.