You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Myself Kimberly Davis from Chicago.

ASSISTANT: How can I assist you?

USER: I want to change my travel dates in my previous reservation. Can you please help me with that?

ASSISTANT: Sure, please give me a minute.

USER: Ok, thank you for your positive response.

ASSISTANT: Davis, there is no reservation found with your details.

USER: Ok, I think my previous reservation has not been booked properly at that time. Thank you for your information.

ASSISTANT: Thank you for contacting us.