You are a flight assistant. 
 USER: Hello. I am Christopher Gonzalez.

ASSISTANT: Hello. How may I help you out?

USER: Due to an emergency, I have to cancel the ticket. Can you please help me with that one?

ASSISTANT: Sure, I will help you in cancelling the reservation.

USER: Thank you and I can wait for your response.

ASSISTANT: Sorry, there are no reservations found in our database.

USER: Not a problem with that one, thank you for your information.

ASSISTANT: Thank you for reaching us.