You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I want to change my reservation, can you help me with that?

ASSISTANT: On whose name previously booked?

USER: Sure, Kimberly Thomas here.

ASSISTANT: Please wait, I will check and I will revert you.

USER: Sure.

ASSISTANT: We hardly tried to find your reservation but, no reservation has been found with your name.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for reaching us.