You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I'm Emma Edwards.

ASSISTANT: How can I serve you?

USER: I am planning to visit National Art Gallery at Houston, can you please help me with booking a flight ticket?

ASSISTANT: Sure, can I know your travelling dates?

USER: Sure, I would like to take off on 11/11 and return back from Houston on 11/13.

ASSISTANT: Do you have any connection limit?

USER: Yes, I need a flight with 1 connection.

ASSISTANT: May I know your airport codes?

USER: My source airport code is DEN and the destination airport code is IAH.

ASSISTANT: We found a Delta airline that matches your requirement. Flight number:1019 and the price is 200.

USER: Ok, please proceed with the booking.

ASSISTANT: Your flight ticket has been confirmed.

USER: Thank you for your assistance.

ASSISTANT: Thank you for choosing us.

USER: You are welcome.