You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I guide you?

USER: Owing to an emergency, I want to cancel my recent reservation. Can you help me out?

ASSISTANT: Sure, can you help me with your name to proceed?

USER: Sure, my name is Samantha Walker.

ASSISTANT: No reservation found for this search.

USER: That's ok, thank you for the information.

ASSISTANT: Sorry for inconvenience. Thank you for choosing us.