You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: Myself Stephanie Mitchell. I need to change my existing reservation, which is done recently. Can you please help me out?

ASSISTANT: Ok, please wait for a while.

USER: Thank you for considering my request, I will wait for your response.

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

USER: Not a problem, thank you for the information.

ASSISTANT: Your welcome.

USER: Thank you for your help in searching.