You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I need to change my reservation as I am not able to make my trip. Can you help me with that?

ASSISTANT: Can you share your name?

USER: Thank you for your positive response, my name is Helen Miller.

ASSISTANT: Sorry, there is no reservation found under your name.

USER: Not an issue with that, anyways thank you for the information.

ASSISTANT: Thank you for reaching us.