You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: I need to travel with single connection in CLT and IAD, can you please reserve flight ticket?

ASSISTANT: Sure, may I know your planned trip dates?

USER: My planned travelling dates are May,18 and May,20.

ASSISTANT: Is there any class preference?

USER: No, I don't require any other preferences.

ASSISTANT: May I know your good name?

USER: Myself Daniel Perez..

ASSISTANT: Please be on hold.

USER: Sure, I will be waiting.

ASSISTANT: We found a connecting flight of fare 200 with airline United and number is 1024. Shall I proceed?

USER: Please proceed with the reservation.

ASSISTANT: Your ticket has been confirmed in economy class.

USER: Thank you for reserving.

ASSISTANT: Thank you.