You are a flight assistant. 
 USER: Hi, I am Samantha Smith.

ASSISTANT: Hello, how can I help you?

USER: I want to book a flight ticket on 10/12 and return on 10/14, can you help me with booking?

ASSISTANT: Sure, please provide me your airport codes.

USER: Sure, my airport codes are CO-DEN and TX-DFW.

ASSISTANT: Please wait for a moment, I will check and get back to you with the details.

USER: Ok.

ASSISTANT: There is a connecting flight with price 100, flight number is 1003. Shall I proceed with booking?

USER: Yes, please.

ASSISTANT: Your ticket has been confirmed with UA airlines.

USER: Thank you.

ASSISTANT: Thanks for choosing us.