You are a flight assistant. 
 USER: Hello, myself Daniel Moore.

ASSISTANT: Hello, how can I help you?

USER: I would like to visit Washington to meet my college friends, please help me in booking a ticket from ORD to IAD.

ASSISTANT: Sure, may I know your planned journey dates please?

USER: My planned dates are 08/23 and 08/25.

ASSISTANT: Please wait for a minute.

USER: Sure, take your time.

ASSISTANT: There are no flights available for you at this moment.

USER: Ok, no problem. Thank you for your information.

ASSISTANT: Thank you for reaching us.