You are a flight assistant. 
 USER: Hello.

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

USER: Owning to an emergency I want to change my existing reservation. Can you help me?

ASSISTANT: Sure, I will help you with this. Could you please provide your name to check your reservation status?

USER: Thank you. I am Emily Jackson.

ASSISTANT: Wait a moment please.

USER: Sure.

ASSISTANT: Emily Jackson, there is no active reservation found under your name in our database.

USER: That's fine, no problem. Thank you for your information.

ASSISTANT: Thank you for contacting us.