You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Stephanie Brown.

ASSISTANT: In which way I can assist you at this moment?

USER: I planned to meet my cousin in MSP, can you please help me to book a flight ticket from IAD?

ASSISTANT: Sure, will you please provide your preferable dates of travelling?

USER: I prefer to travel on Jul 27 and Jul 29.

ASSISTANT: Is there any specific timings in your departure and arrival?

USER: I planned to depart in afternoon.

ASSISTANT: Do you have any class preference?

USER: I am comfortable all the classes.

ASSISTANT: Do you have any connection limit?

USER: I prefer to travel in a connecting flight.

ASSISTANT: Please be on hold.

USER: Sure.

ASSISTANT: We regret to inform you that, there are no flights available for your journey with your requested preferences.

USER: Ok, no problem. Thank you for your information.

ASSISTANT: Thank you for utilising our services.