You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I abet you today?

USER: I am Shirley Mitchell. My family tour trip got postponed, so I want to change an existing reservation. Could you please help me in changing the reservation?

ASSISTANT: Sure, we are here to help you. Please wait for some time, I will check with your existing reservation status and revert to you.

USER: Ok, I will wait.

ASSISTANT: Thank you for waiting, we hardly tried to find your reservation but, no reservation has been found with your name.

USER: Not an issue. Thank you.

ASSISTANT: Thank you for reaching us.