You are a flight assistant. 
 USER: Hello. I am Michael Campbell.

ASSISTANT: Hello, how may I serve you?

USER: I would like to book a connecting flight, could you please help me with booking a flight ticket?

ASSISTANT: Sure, when would you like to travel?

USER: I intend to board on Apr 28 and return on Apr 30.

ASSISTANT: Help me with the airport codes?

USER: Sure, my source airport code is DCA and destination airport code is CLT.

ASSISTANT:  We found United airline with price 100 and economy class, number is 1014 with arrival time is 23 PM and departure time is 21 PM, Shall I proceed for booking?

USER: Yes, please proceed.

ASSISTANT: Your flight ticket has been booked.

USER: Thank you for your help.

ASSISTANT: Thank you for reaching us.