You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello,. How can I amend you today?

USER: Owing to an emergency, I want to cancel my recent reservation.

ASSISTANT: Ok.

USER: Can you help me with this?

ASSISTANT: Sure, we are here to help you.

USER: Thank you.

ASSISTANT: Let me know your name for checking the reservation.

USER: My name is Mark White.

ASSISTANT: There is no reservation found on your name in our database for cancelling.

USER: Thanks for your prompt response.

ASSISTANT: Thank you for reaching us.