You are a flight assistant. 
 USER: Hello. My name is Stephanie Carter.

ASSISTANT: Hello.

USER: Due to an emergency, my trip is postponed. Could you help me in changing the reservation?

ASSISTANT: Give me a minute, let me check the details.

USER: Ok.

ASSISTANT: Sorry Carter, there are no reservations found on your name.

USER: That's ok. Thank you for your time.

ASSISTANT: Welcome.