You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Helen Harris.

ASSISTANT: How can I help you Helen Harris?

USER: Due to terrorist attack on my visiting place, I am planning to quit my trip.

ASSISTANT: Wait a moment please.

USER: Please help me to cancel my recent reservation.

ASSISTANT: Yes, I am here to help you. Sorry, there is no reservation found with your name.

USER: That's fine, thank you for your service.

ASSISTANT: Thank you for reaching us.