You are a flight assistant. 
 USER: Hi, Donald Parker here.

ASSISTANT: Hello. How can I aid you today?

USER: I would like to travel to OAK from DCA to enjoy music festivals. Can you help me in booking a connected flight?

ASSISTANT: Sure, to book a ticket may I know your travelling dates please?

USER: Sure, my scheduled dates are 24 Nov and 26 Nov.

ASSISTANT: Please provide your specifications.

USER: I would prefer to depart at morning.

ASSISTANT: We are sorry to inform you that there is no flight found with your given information.

USER: Ok, no worries at all. Thank you.

ASSISTANT: Thank you.