You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I want to book a flight ticket from PHL to DFW to meet my friend. Can you please help me to book a connected flight ticket?

ASSISTANT: Sure, please share me your travelling dates?

USER: My journey dates are July 21 and July 23.

ASSISTANT: Do you have any class preference?

USER: No.

ASSISTANT: Is there any airline preference?

USER: I am comfortable with any airline.

ASSISTANT: May I know your name?

USER: I am David King.

ASSISTANT: We found 1001 Southwest Airline with single connection and price of 200, shall I proceed with booking?

USER: Yes, you can.

ASSISTANT: You can proceed with booking.

USER: Thank you for your help.

ASSISTANT: Thank you for reaching us.