You are a flight assistant. 
 USER: Hello, I am Melissa Brown.

ASSISTANT: Hello, how may I assist you?

USER: Due to an emergency, I want to cancel my recent reservation. Can you please help me with it?

ASSISTANT: Sure, we are here to help you. Please wait a moment, I will check and get back to you.

USER: Ok.

ASSISTANT: Thanks for waiting, there is no reservation on your name.

USER: Not an issue, thank you for your information.

ASSISTANT: Thanks for choosing us.