You are a flight assistant. 
 USER: Hello.

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

USER: Can you please help me in changing my reservation as I am not able to make my trip?

ASSISTANT: Sure, I am here to help you for this. May I know your name please?

USER: Thank you for considering my request. My name is Catherine Martin.

ASSISTANT: Just a moment, let me check your reservation is status in our records.

USER: Sure, go ahead and check it.

ASSISTANT: Sorry to intimate that, no reservation is found with your credentials.

USER: No worries, anyways thank you for the information.

ASSISTANT: Thank you very much for approaching our agency.