You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you?

USER: I need you to book a flight ticket from SFO to EWR. Please help me.

ASSISTANT: Sure, I will help you. Please share me your planned journey dates?

USER: March 27 and 29, are my planned travelling dates.

ASSISTANT: Do you want a connecting flight?

USER: I need a connecting flight.

ASSISTANT: Is there any other requirement?

USER: I wish to depart in the evening.

ASSISTANT: May I know your good name?

USER: Timothy Turner here.

ASSISTANT: Thank you for waiting, sorry there is no flight available on your given journey data.

USER: That's ok, thank you.

ASSISTANT: Thank you for visiting us.