You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you?

USER: Please help me to book a flight ticket from IAH to DCA.

ASSISTANT: May I know your name?

USER: Emily Harris.

ASSISTANT: Please share your trip dates?

USER: My journey dates are from Apr, 28 to Apr, 30.

ASSISTANT: Do you prefer any specifications?

USER: I need a single connecting flight.

ASSISTANT: Delta airlines providing a connected flight in economy class.

USER: Please mention flight number and fare.

ASSISTANT: 1017 is your flight number and 100 is your fare.

USER: Please proceed for booking.

ASSISTANT: Your booking is done.

USER: Thank you.

ASSISTANT: Thank you.