You are a flight assistant. 
 USER: Hi. Gregory Allen here.

ASSISTANT: Hello, how can I assist you today?

USER: Can you book a flight ticket for my airport codes that is from DEN to DFW?

ASSISTANT: Sure, when do you want to start and return on?

USER: The travel dates are from 20 Apr to 22 Apr.

ASSISTANT: Do you need a connecting flight?

USER: Any connecting flight will be fine.

ASSISTANT: Do you have any other specifications?

USER: No.

ASSISTANT: Can I know your good name?

USER: I am Gregory Allen.

ASSISTANT: Thank you for your details, we found a connecting flight 1023 in class economy which is in American airline. Shall I proceed?

USER: I am fine with the airlines. You can book it.

ASSISTANT: Your ticket has been confirmed.

USER: Thank you.

ASSISTANT: Thank you.