You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you at this moment?

USER: I am Jennifer Lewis.

ASSISTANT: Yes Lewis.

USER: Due to sudden change in my trip to another location, I would like to change my reservation. Can you please help me out?

ASSISTANT: Sure, I will help you with that, please hold on for a moment to check your reservation status.

USER: Sure.

ASSISTANT: Lewis, I did not find any reservation with your name in my database.

USER: Ok, No problem. Thank you.

ASSISTANT: You are welcome. Thank you for reaching us.