You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am Emma King, I need to change my existing reservation. Could you please help me for changing the reservation?

ASSISTANT: Sure, give me a minute to check and get back to you.

USER: Sure, I will wait for your response.

ASSISTANT: Thank you for your time. Unfortunately there is no reservation found according to your name.

USER: Not an issue, Thank you very much for your help.

ASSISTANT: Thank you for being with us.