You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. Can I know your concern?

USER: Owing for an emergency, I want to cancel my flight reservation. Can you please help me?

ASSISTANT: Ok, please may I know your name?

USER: Thank you. I am Alexander Hernandez.

ASSISTANT: Ok, I will check please wait.

USER: Sure.

ASSISTANT: Ok, thank you for waiting. Sorry as per the records your reservation is not found to cancel.

USER: No problem, thank you for checking.

ASSISTANT: Thank you for choosing our agency.