You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello,. How may I assist you?

USER: I made my reservation in advance, but now found out I don't have any leaves so  I want to change my reservation. Could you please help me with changing my reservation?

ASSISTANT: Sure, may I know your name please?

USER: Sure, I am Sharon Carter.

ASSISTANT: Please wait for a second.

USER: Sure, I will wait.

ASSISTANT: Thanks for waiting, we did not find any reservation with your name.

USER: No worries, thank you for the information.

ASSISTANT: Thanks for reaching us.