You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: Joseph Adams here. I want to meet my cousin, please book my ticket from DFW to LAX.

ASSISTANT: Ok, can you share me your travelling dates?

USER: My travel dates are 09/21 and 09/23.

ASSISTANT: Give me a moment.

USER: Sure.

ASSISTANT: Sorry to inform you that there are no flights found on your requested dates.

USER: It's ok, thank you.

ASSISTANT: Thank you for consulting us.