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

ASSISTANT: Hello, how may I help you?

USER: Owing to an emergency I need to cancel my reservation, can you please help me out with cancellation?

ASSISTANT: Sure, I am here to help you. Please stand by.

USER: Ok.

ASSISTANT: Thank you for your time, sorry no reservation found with your name.

USER: Ok, not an issue. Thank you.

ASSISTANT: Thank you for reaching us, have a nice day.