You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Charles Martinez.

ASSISTANT: How can I assist you at this moment?

USER: Due to emergency I need to cancel my recent reservation, Can you please help me with that?

ASSISTANT: Sure, I will help you with this. Please give me a moment to check your reservation status.

USER: Sure.

ASSISTANT: Charles Martinez, there is no active reservation found under your name in our database.

USER: Ok, no problem. Thanks for your information.

ASSISTANT: Thank you for utilising our service.