You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you today?

USER: Please help me out in booking flight ticket from JFK to EWR.

ASSISTANT: Sure, may I know your depart and return dates?

USER: Yes, my depart date is July 08 and return date is July 10.

ASSISTANT: Can I know your name?

USER: My name is Debra Walker.

ASSISTANT: Do you need a single connecting flight?

USER: Yes.

ASSISTANT: May I know your other preferences?

USER: I don't have any other preferences.

ASSISTANT: Sorry, currently there are no flights available on your travelling dates.

USER: That's ok, thank you for the response.

ASSISTANT: Thank you for choosing us.