You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Edward Rodriguez.

ASSISTANT: How can I assist you today?

USER: I want to book a normal-cost airline to attend a party. Can you help me?

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

USER: IAD and MSP are my airport codes.

ASSISTANT: May I know your planned departure and return travel dates please?

USER:  01/06 and 01/08 are my travelling dates.

ASSISTANT: May I know in which class you prefer to travel?

USER: I am comfortable with any class.

ASSISTANT: Ok, do you have any other specifications?

USER: I need a connecting flight.

ASSISTANT: Ok, please wait for a while.

USER: Ok.

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

USER: No issue. Thank you.

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