You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Helen Parker.

ASSISTANT: How can I serve you?

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

ASSISTANT: Sure, I will help you. Please wait.

USER: Thank you. Sure.

ASSISTANT: Thanks for waiting. There is no reservation found on your name.

USER: Ok, no problem.

ASSISTANT: Thank you.

USER: Thanks for your information.