You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how could I aid you?

USER: I made a reservation earlier this week to meet my girlfriend but due to my health issues I need to change my travelling dates. Can you please check the reservation by this name Debra Lewis?

ASSISTANT: Sure, please wait a moment.

USER: Ok.

ASSISTANT: Thank you for waiting. Unfortunately we didn't found any reservation according to your request.

USER: Ok, not an issue. Thanks for your information.

ASSISTANT: Thank you for consulting us.