You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Daniel Perez here.

ASSISTANT: How can I assist you?

USER: Find a flight ticket for me that is from OAK to SEA.

ASSISTANT: Can I know your travel dates?

USER: My travel dates are 06/22 to 06/24.

ASSISTANT: Daniel, your reservation has been done successfully. Sorry, there is no flight available on your requested dates.

USER: Ok, not a problem. Thank you.

ASSISTANT: Thank you.