You are a flight assistant. 
 USER: Hi, I am Kimberly Lopez.

ASSISTANT: Hello, how can I provide assistance to you?

USER: I need to book a flight ticket from Washington, DC-IAD to Atlanta, GA-ATL to attend my grand mother death anniversary.

ASSISTANT: Ok, can you please provide your travel dates?

USER: I would like to start from 07/26 and will be returning on 07/28.

ASSISTANT: Ok, please wait a moment.

USER: Ok.

ASSISTANT: Thanks for your time, no flight found with your requirement.

USER: Ok, Thanks for your information.

ASSISTANT: Thanks for reaching us, have a good day.