You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I aid you today?

USER: I need to book a ticket from BOS to OAK. Could you book a ticket?

ASSISTANT: Sure, may I know your name please?

USER: My name is Patrick Roberts.

ASSISTANT: Kindly share if you have any connection preference.

USER: I prefer direct flight.

ASSISTANT: Do you have any other requirements to met?

USER: I would like to depart in the afternoon.

ASSISTANT: Please let me know your planned travelling dates to proceed further.

USER: Travel dates are from June, 23 to June, 25.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: Thank you for waiting, sorry to inform you that there are no flights found with your essential details.

USER: Thank you.

ASSISTANT: Thank you for approaching us.