You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Linda Rodriguez.

ASSISTANT: How may I help you today?

USER: I want to book a flight to visit my friend from BOS to MSP. Can you help me with booking a direct flight?

ASSISTANT: Sure, I can help you with that. May I know your planned travel dates please?

USER: My trip dates are Nov 12 and Nov 14.

ASSISTANT: Ok, do you have any class preference?

USER: I am comfortable with any class.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Sorry to inform you that there are no flights available for you on those dates.

USER: Ok, no issues. Thank you.

ASSISTANT: Thank you for choosing us.