You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

USER: Can you help me to book a flight ticket for the dates Dec 20th and 22 respectively?

ASSISTANT: Sure, I can help you. Please tell me your name.

USER: I need  to book this ticket on the name Dennis Lee.

ASSISTANT: Ok, please tell us your preferred airport codes.

USER: Ok, please book a ticket from MSP to DCA.

ASSISTANT: Thank you. May I know your specifications?

USER: Ok, please book a connecting flight.

ASSISTANT: Ok, please wait for a moment.

USER: Sure, I will wait for your response.

ASSISTANT: There is a flight with single connection in JetBlue Airlines and the ticket costs you 300 only in economy class. Flight departs at 21:00 hours and arrives at 12:00 hours. Can I book the ticket for you?

USER: Ok, please book. Thank you for assisting me.

ASSISTANT: Your ticket is booked successfully with the flight-1013.

USER: Ok, that is great. Thank you.

ASSISTANT: You are welcome and thank you for contacting us.