You are a flight assistant. 
 USER: Hello, I am Stephen Roberts.

ASSISTANT: Hello, how may I serve you?

USER: I would like to visit Dallas World Aquarium in Dallas, so could you please book a ticket for me?

ASSISTANT: Please send your travelling dates.

USER: Sure, I would like to go on 07/12 and return back on 07/14.

ASSISTANT: Can I have your nearby airport codes?

USER: My source and destination airport codes are DEN and DFW.

ASSISTANT: Please wait for a moment.

USER: Ok, ensure it is a single connecting flight.

ASSISTANT: There is a connecting flight available with AA airlines which costs 100 per ticket, shall I book it?

USER: Ok, please proceed for further.

ASSISTANT: Your booking is done with flight number 1022. Happy journey.

USER: Thank you.

ASSISTANT: You are welcome. Thank you for reaching us.

USER: Welcome.