You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: Myself Daniel Clark, I need to travel from OAK to MSP, can you help me in booking flight ticket.

ASSISTANT: Sure, I am happy to aid you in flight ticket booking process. Can you please let me know your preferable travel dates for booking flight ticket?

USER: Here are my travelling dates 06/28 and 06/30, my budget should not exceed 1000.

ASSISTANT: Sure, please wait for a moment.

USER: Sure, take your time.

ASSISTANT: Sorry to say, no flight is available for you as per your requests.

USER: That's not an issue, I will choose any other source to travel that place.

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

USER: Thank you for helping me.