You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you?

USER: Can you help me to book a flight ticket from MSP to IAD?

ASSISTANT: Sure, we are mirthful to help you. On which dates would you like me to book a flight ticket for you?

USER: My travelling dates are 23 to 25 of Dec.

ASSISTANT: Do you need any connections between your trip?

USER: I need a connecting flight.

ASSISTANT: Is there any other requirements?

USER: I prefer to depart in the morning.

ASSISTANT: May I know your name?

USER: I am Ashley Lee.

ASSISTANT: We found a connecting flight of fare 200 with United airlines and number 1025. Can I book?

USER: Please proceed.

ASSISTANT: Your ticket has been booked successfully.

USER: Thank you.

ASSISTANT: Thank you for opting us.