You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: My name is Catherine Mitchell. My friend has invited to attend a party at New York. Can you help me in booking a ticket from SFO to JFK?

ASSISTANT: May I know your travelling dates please?

USER: The dates which I am planning my journey are 03/11 and 03/13.

ASSISTANT: I am sorry no flights found on your route.

USER: Its ok, thank you for the information.

ASSISTANT: Thank you for choosing us.