You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you now?

USER: Can you please help me in booking a flight ticket to IAD from DFW?

ASSISTANT: Ok, please mention your travelling dates.

USER: My travel dates are from 02/25 to 02/27.

ASSISTANT: Do you need a connection for your flight journey?

USER: I need a connecting flight.

ASSISTANT: May I know your good name?

USER: I am Alexander Hall.

ASSISTANT: May I know your depart and return time?

USER: I am comfortable with any flight.

ASSISTANT: Do you have any other requirements?

USER: Yes, I would like to travel in economy class.

ASSISTANT: Flight-1015 is available for you with 1 connection with economy class by United airlines. Can I book it for you?

USER: Yes, you can book it.

ASSISTANT: Your ticket is successfully booked.

USER: Thank you.

ASSISTANT: Thank you for approaching our services.