You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you today?

USER: I want to change my existing reservation, can you help me?

ASSISTANT: Sure, may I have your name?

USER: I am Susan Hall.

ASSISTANT: Please wait.

USER: Sure.

ASSISTANT: Thanks for your time, No reservation was found on your name.

USER: No, worries. Thank you.

ASSISTANT: Thank you.