You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

USER: I need to change my reservation as I am not feeling well. Can you help me with that?

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 Jessica Mitchell.

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

USER: Sure.

ASSISTANT: Sorry for inconvenience, no reservation is found under your name to change.

USER: Not a problem, anyways thank you for the information.

ASSISTANT: Thank you very much for approaching our agency.