You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how can I assist you?

USER: My name is Ruth Lopez. I want to go for San Francisco to meet my mother.

ASSISTANT: Ok, can you provide your travelling details.

USER: Please, book a ticket from MA - BOS on 11/07 to CA - SFO, and my return date is 11/19.

ASSISTANT: Sure, please wait for a minute, let me check the details.

USER: Ok.

ASSISTANT: Sorry, to inform you that there is no flight found on your details.

USER: Ok, not a problem.

ASSISTANT: Thank you, for reaching us.

USER: Thank you for your service.