You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am Joshua Martinez. I want to book a ticket from San Francisco, CA - SFO to Atlanta, GA - ATL to attend my grandmother's demise. Can you book me a ticket on the dates July/15 to July/17?

ASSISTANT: Sure, please wait a while.

USER: Ok.

ASSISTANT: Thanks for waiting. There is no flight found with your requirements.

USER: Ok, no issues. Thanks for your response.

ASSISTANT: Thank you and have a good day.