You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you?

USER: Myself Pamela Garcia. I am planning to go to Los Angeles to meet my parents, can you book a ticket from DTW to LAX?

ASSISTANT: Sure, I am here to help you. Could you please share your travelling dates?

USER: Ok, the travel dates are 01/18 and 01/20.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: Sorry, there is no flight available as per your requests.

USER: Ok, no problem. Thank you so much.

ASSISTANT: Thank you for choosing us, have a nice day.