You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you for today?

USER: I want to change my reservation, can you please help me to modify my travelling dates?

ASSISTANT: I am here to help you about that. Can you please let me know your name for checking the reservation status?

USER: My name is Pamela Collins.

ASSISTANT: Please be on hold for a while to check in our booking list.

USER: Sure.

ASSISTANT: Sorry Pamela Collins, there is no active reservation under your name in our booking list.

USER: Ok, not a problem. Thank you.

ASSISTANT: You are welcome, thank you for reaching us.