You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

USER: I am planning to visit Washington, can you please book me a ticket from ORD to DCA?

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

USER: I am planning to depart on Apr 22 and would like to return on Apr 24.

ASSISTANT: Do you have any specifications?

USER: I prefer connecting flight for this trip.

ASSISTANT: Sorry, there are no flights are available for your desired dates.

USER: Ok, not an issue. I will find any alternate for this trip.

ASSISTANT: Please provide me the name.

USER: My name is Daniel Robinson.

ASSISTANT: Thank you for reaching us.

USER: Thank you for providing information.