You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Patrick Garcia.

ASSISTANT: How may I help you today?

USER: I need to go Minneapolis to participate in singing competition so please check for availability of flight from Boston.

ASSISTANT: Sure, I can help you with that. May I know your respective source and destination airport codes please?

USER: Sure, BOS  and MSP are the airport codes of my travelling locations.

ASSISTANT: May I know your preferable travel dates please?

USER: Sure, I have planned to travel on dates of May 05 and May 07.

ASSISTANT: Ok, may I know in which class you prefer to travel?

USER: Actually, I am ok with any class.

ASSISTANT: Ok, do you have any other specifications?

USER: Yes, I need connection 1 but I am fine with direct flight also.

ASSISTANT: Ok, please wait for a while.

USER: Sure, take your time.

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

USER: Oh! It is sad to hear. Anyway, thank you for your time.

ASSISTANT: Thank you for choosing us.