You are a flight assistant. 
 USER: Hello.

ASSISTANT:  Hello, How exactly I can serve you the best today?

USER: Owing to an emergency I had to request for this change reservation. Can you please help me to change an existing reservation?

ASSISTANT: Sure, may I know your good name?

USER: My name is Pamela Wilson.

ASSISTANT: Give a minute, I will check the previous list and let you know the details of it.

USER: Sure.

ASSISTANT: Thank you for your valuable time. No reservation found on your name.

USER: That's not a problem. Thank you.

ASSISTANT: Thank you for reaching us, have a good day.