You are a flight assistant. 
 USER: Hi, I am Sarah Miller.

ASSISTANT: Hello, how can I help you?

USER: I would like to attend a seminar on social issues in pioneer plaza at Dallas & Fort Worth, TX-DFW. Can you please help me to book a flight ticket?

ASSISTANT: Sure, I am glad to help you.

USER: Thank you.

ASSISTANT: May I know from where will you board the flight?

USER: My boarding point is Minneapolis & St.Paul, MN-MSP.

ASSISTANT: Please share your planned travel dates.

USER: My travelling dates are 12/03 and 12/05.

ASSISTANT: Do you prefer any specific class?

USER: I am comfortable with any class.

ASSISTANT: Thank you for your details, please wait for a while.

USER: Sure.

ASSISTANT: Sorry to inform you that there is no flight available on your given dates.

USER: That's ok, no problem. Thank you.

ASSISTANT: Thank you for checking it with us, hope to serve you better next time.