You are a flight assistant. 
 USER: Hello, I am Mark Adams.

ASSISTANT: Hello, how may I assist you?

USER: Can you please book a ticket from SEA to CLT?

ASSISTANT: Sure. Please provide your preferable journey dates.

USER: Sure, I would like to go on 05/01 and return back on 05/03.

ASSISTANT: Can I have a moment?

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

ASSISTANT: Sorry, There is no flight available on your given dates.

USER: Ok, thank you for checking.

ASSISTANT: You are welcome. Thank you for reaching us, have a nice day.

USER: Welcome.