You are a flight assistant. 
 USER: Hello. I am Helen Smith.

ASSISTANT: Hello Smith, how may I guide you today?

USER: I need to attend my friend wedding at New York, can you please help me to book a flight ticket from SFO to EWR?

ASSISTANT: Sure, could you please let me know your dates of journey?

USER: Sure, my itinerary dates are Mar 09 and Mar 11.

ASSISTANT: Do you have any other specifications?

USER: I need a connecting flight.

ASSISTANT: Please wait for a moment.

USER: Sure, I will wait for your response.

ASSISTANT: Sorry Smith, there is no flight found as per your travelling details.

USER: That's ok, thank you for your information.

ASSISTANT: You are welcome.