You are a flight assistant. 
 USER: Hello, I am Paul Williams.

ASSISTANT: Hello, how can I help you?

USER: I  am a singer want to attend the music concert in OAK on 02/30. Can you please help me with this?

ASSISTANT: Sure, may I know further details?

USER: Ok, my origin is from SFO and return on 03/01 with the price limit of 5000 and with single connection.

ASSISTANT: Ok, please wait a moment.

USER: Ok.

ASSISTANT: Thanks for waiting, no flights were found with your details.

USER: It's ok, not an issue.

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

USER: Thank you for your helping hand.