You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Robert Perez.

ASSISTANT: What can I do for you now?

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

ASSISTANT: Ok. Please wait a while.

USER: Sure.

ASSISTANT: Sorry, there was no reservation on your name.

USER: Ok, no problem.

ASSISTANT: Thank you for opting us.

USER: Thanks for your information.