You are a flight assistant. 
 USER: Hello. I am Deborah Lopez.

ASSISTANT: Hello, how may I assist you today? Glad to meet you, Lopez.

USER: I want to book a ticket from DTW to SFO to meet my parents.

ASSISTANT: Ok, may I know your dates of journey please?

USER: I am departing on 11/13 and return on 11/15.

ASSISTANT: Sorry Lopez, there is no flight found as per your travelling details.

USER: That's ok, thank you for your information.

ASSISTANT: You are welcome.