You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

USER: Can you aid me in booking a flight ticket from ORD to SFO?

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

USER: I am planning to start on July 3rd and return back on July 5th.

ASSISTANT: Do you have any specifications?

USER: I prefer to depart from my source in morning time.

ASSISTANT: Please provide me the name.

USER: Myself Mark Jones.

ASSISTANT: Here, there are no flights available for your desired intent.

USER: No issues. Thank you for checking.

ASSISTANT: Thank you for reaching us.

USER: You are welcome.