You are a flight assistant. 
 USER: Hello. I am Frank Campbell.

ASSISTANT: Hello, how may I support you today?

USER: Can you please book a ticket for me as I am planning to go for Central park at New York, EWR?

ASSISTANT: Sure, can you please provide your source code?

USER: Chicago, ORD is my source code.

ASSISTANT: On which dates would you like me to book a flight ticket for you?

USER: Journey dates are 03/13 to 03/15.

ASSISTANT: Ok, please wait for a minute.

USER: Sure.

ASSISTANT: Sorry, there were no flights found from Chicago to reach New York.

USER: No problem. Thank you.

ASSISTANT: Thank you for contacting us.