You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you today?

USER: Please book me a ticket from DCA to MSP to meet my family.

ASSISTANT: Sure, may I know your name please?

USER: Myself Eric Green.

ASSISTANT: May I know on which dates your willing to travel?

USER: I have planned to travel on Aug 31st after meeting my family I will return to fly on Sept 02nd.

ASSISTANT: Do you prefer any specific airline preference to travel?

USER: I would like to depart at morning time and I like connecting flight.

ASSISTANT: May I know your class preference to travel?

USER: I am ok with any class.

ASSISTANT: Sorry Green, there is no flight found as per your travelling details.

USER: Ok, no problem in that.

ASSISTANT: Thank you for reaching us.

USER: Thank you.