You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you?

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

ASSISTANT: I will help you with that pleas share your name to proceed  further?

USER: Sure, Lisa Hernandez here.

ASSISTANT: Please be on hold for a while.

USER: Sure, take your time.

ASSISTANT: Sorry, there is no reservation found in our database.

USER: Ok, thanks for sharing the information.

ASSISTANT: Thank you for choosing us.