You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you?

USER: I want to reserve my flight from CLT, as I have a meeting with my colleagues at IAD. Can you please help me in reserving my flight?

ASSISTANT: Sure, can you please share your travel dates?

USER: Thank you for accepting my request. My planned journey dates for my journey are Mat 6th and Mar 8th.

ASSISTANT: Do you have any connection limit?

USER: I prefer a flight which has maximum of a single connection.

ASSISTANT: May I know your airline preference?

USER: Thank you for asking, but I am comfortable in any airlines.

ASSISTANT: In which class do your prefer to travel?

USER: I am comfortable in either a business class or an economy class.

ASSISTANT: Do you have any specific depart and arrival time?

USER: Yes, I want to return in the evening time.

ASSISTANT: May I know your name to proceed further?

USER: Sure, my name is John Parker.

ASSISTANT: Ok, please be on hold.

USER: Ok, sure. I will wait for your response.

ASSISTANT: Sorry for the inconvenience,  there are no flights in this route as per your travelling details.

USER: Ok, no issues. Anyways, thank you for the information.

ASSISTANT: Thank you for choosing us.