You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I serve you?

USER: My name is Debra Hernandez. Due to a sudden meeting, my trip is postponed.

ASSISTANT: Ok, please provide me few more details of your journey.

USER: Can you help me in changing the reservation?

ASSISTANT: Let me check for a moment. No reservations found on your name.

USER: That's OK.

ASSISTANT: Thanks for reaching us.

USER: Thank you for your time.

ASSISTANT: Have a nice day.