You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am Ruth Davis. I want to book a ticket from ORD to JFK, can you help me in booking?

ASSISTANT: Sure, can you share your travel dates please?

USER: I am departing on 01/15 and return on 01/17.

ASSISTANT: Thanks for waiting. But I am sorry to say that there are no flights available.

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

ASSISTANT: Thank you.