You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: We friends are planning a trip to Dallas to celebrate our friendship, Can you please help me with flight booking?

ASSISTANT: Sure, may I know your source and destination airport codes?

USER: I will travel from IAD to DFW.

ASSISTANT: Can you please share your depart and return dates?

USER: My depart and return dates are 11/08 and 11/10 respectively.

ASSISTANT: Do you want connecting flight?

USER: Yes, I want a connecting flight.

ASSISTANT: May I know your name please?

USER: My name is William Phillips.

ASSISTANT: Ok, we found a Frontier airline, flight number: 1000, price: 100 with one connection.

USER: It looks good, please proceed.

ASSISTANT: Your flight ticket has been confirmed.

USER: Thank you for your help.

ASSISTANT: Thank you.