You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: Can you aid me to change my reservation due to an emergency?

ASSISTANT: Sure, I can help you. Please let me know your name.

USER: Samuel Roberts here.

ASSISTANT: Thank you. Please wait for a while. I will check your reservation status and let you know.

USER: Sure.

ASSISTANT: Sorry, I did not find any reservation under your name in our database.

USER: Thank you for the help.

ASSISTANT: You are welcome and thank you for choosing us.