You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, what kind of help you are looking for?

USER: I am planning to attend music concert at CLT, can you please help me with booking a flight ticket from IAD?

ASSISTANT: Sure, kindly assign your specific dates of travelling?

USER: I would like to take off on Apr 25 and return on Apr 27.

ASSISTANT: Please let me know your connection limit.

USER: I am looking for a connecting flight.

ASSISTANT: Are  there any more preferences in your journey?

USER: I don't have any other preference.

ASSISTANT: May I know your name please?

USER: My name is Amanda Martinez.

ASSISTANT: Sorry to inform you that, we are unable to provide flights on your preferred routes.

USER: Ok, no issues. Thank you for checking.

ASSISTANT: Thank you for choosing us. Have a good day.

USER: You are welcome.