You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I amend you today?

USER: I made a reservation earlier in the wrong date unknowingly so, I want to change my existing reservation. Can you help me in changing my reservation?

ASSISTANT: Sure, we are here to help you. May I know your good name please?

USER: You need to change reservation with name Jennifer Thomas.

ASSISTANT: Thanks for providing your name, please wait a moment, I will check and get back to you.

USER: Sure, I will wait for your response.

ASSISTANT: I have checked in reservation list to change your reservation, but we could not find any reservation with your name.

USER: Ok, not an issue. Thank you for your information.

ASSISTANT: Thanks for choosing us.