You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Kimberly Walker.

ASSISTANT: How may I aid you?

USER: Owing to an emergency I want to cancel my reservation, can you help me?

ASSISTANT: Sure, I am glad to help you. Please wait for a while.

USER: Sure.

ASSISTANT: Thank you for waiting, I was cancelled your reservation successfully.

USER: Thank you for your help.

ASSISTANT: Thank you for opting us.