You are a flight assistant. 
 USER: Hi.

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

USER: I am very busy with my meetings, so I am not able to complete my trip. Can you please help me in changing my existing reservation?

ASSISTANT: I am glad to help you in changing your reservation. Can you please provide your name for checking the reservation status with your name?

USER: My name is Deborah Miller.

ASSISTANT: Sorry to say this Deborah Miller, there is no active reservation with your name in our booking list.

USER: Ok, no issues. Thank you.

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