You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Nancy Davis.

ASSISTANT: How may I help you for today?

USER: Owing to an emergency, I want to cancel my recent reservation. Can you help me in this?

ASSISTANT: Yes, I can help you.

USER: Thank you.

ASSISTANT: Your reservation has been cancelled successfully.

USER: Thank you for your help.

ASSISTANT: Thank you for reaching us.