You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you today?

USER: I want to do some changes in the existing reservation because my friends are not able to come on the those dates. Can you please help me?

ASSISTANT: Sure, to check reservations details, may I know your name?

USER: Sure, myself Kimberly Collins.

ASSISTANT: Kimberly, I did not find any reservations with your name. Anything else to help you.

USER: Oh it's ok, no problem. No thanks. Thank you for your information.

ASSISTANT: Thank you for reaching out. Have a nice day.