You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: Can you please book the ticket from OAK to SEA? As I'm planning to visit Seattle.

ASSISTANT: Sure, to book a ticket may I know when would you like to travel?

USER: Sure, my planned departure and return travel dates are 11th and 13th of September.

ASSISTANT: Please provide your specifications.

USER: I need direct flight and I want to depart in the morning time.

ASSISTANT: Can you please share me your name?

USER: My name is Elizabeth Hill.

ASSISTANT: Unfortunately there is no flight found with your given information.

USER: Oh! That's ok, thank you for giving the information anyways.

ASSISTANT: Thank you for availing us.