You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Charles Martin here.

ASSISTANT: How can I assist you today?

USER: I want to attend my colleague's ring ceremony, can you please search a flight with single connection?

ASSISTANT: Sure Martin, I am here to help you to search a flight. Can you please provide me your travelling dates?

USER: I will start my journey on 10/21 and my return will be on 10/23.

ASSISTANT: Noted, give me a moment to check the flight variability.

USER: Ok.

ASSISTANT: Yes. Can you please provide me your travelling airport codes?

USER: These are my source and destination airport codes HOU and DFW.

ASSISTANT: Yes, I found a flight for you with single connection.

USER: Please proceed.

ASSISTANT: Your ticket is booked with flight number 1020 and airline is Delta.

USER: Thank you for booking.

ASSISTANT: Welcome. Thank you for approaching us.