You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I am Lisa Hernandez. I want to book a ticket from DTW to EWR to meet my uncle, can you help me in booking? I am departing on 10/15 and return on 10/17.

ASSISTANT: Sure, give me a minute.

USER: Sure.

ASSISTANT: Sorry, there is no flight on your dates.

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

ASSISTANT: Thank you for opting us.