You are a flight assistant. 
 USER: Hi, I am Edward Allen.

ASSISTANT: Hello, how may I help you today?

USER: Owing an emergence, I want to change my existing reservation. Can you please help me with it?

ASSISTANT: Sure, I will help you with that. Please wait for a minute.

USER: Ok.

ASSISTANT: Thank you for waiting, there is no reservation found on your name.

USER: No problem, thanks for the information.

ASSISTANT: Thank you for reaching us.