You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you today?

USER: My name is Timothy Lopez. Owing to an emergency, I had to request for this change reservation.

ASSISTANT: Sure Lopez. I did not found any reservations with your name.

USER: That's ok, thank you for your help.

ASSISTANT: Thank you for contacting us. Have a good day.

USER: You are welcome.