You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you today?

USER: I am Edward Baker, want to alter my reservation due to some changes in my trip. Please help me out with that.

ASSISTANT: Sure, I am here to help you with that. Please wait for a minute.

USER: Sure.

ASSISTANT: Sorry to say that, there is no reservation found on your name in our database.

USER: It's ok, thank you for your help.

ASSISTANT: Thank you for reaching us.