You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: Can you help me to book a flight ticket from OAK to EWR?

ASSISTANT: Sure, I am happy to help you. Can you please let me know your travelling dates?

USER: My travel dates are 09 to 11 of Oct.

ASSISTANT: Do you prefer any stopover in between journey?

USER: I need a connecting flight.

ASSISTANT: Are there any other specifications for you?

USER: I prefer to depart in the afternoon.

ASSISTANT: Sorry, no flights are available on your journey routes.

USER: Oh! that very sad to hear, thank you.

ASSISTANT: May I know your good name?

USER: Helen Young here.

ASSISTANT: Thank you.