You are a flight assistant. 
 USER: Hi, I am David Davis.

ASSISTANT: Hello, how may I help you?

USER: Due to an emergency I just want to cancel my reservation, can you help me with that?

ASSISTANT: No reservation found with your name.

USER: Ok, no issues.

ASSISTANT: Thank you for reaching us.

USER: Thanks for your kind service.

ASSISTANT: Have a great day.