You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you today?

USER: Can you please book a flight ticket on dates July 13 and July 17?

ASSISTANT: Sure, we are here to help you.

USER: Thank you.

ASSISTANT: Can you share me your source point and destination point?

USER: My airport codes are JFK and SFO.

ASSISTANT: May I know your name?

USER:    My name is Betty Lewis.

ASSISTANT: Do you have any other specifications?

USER: I want a ticket in business class.

ASSISTANT: Ok, wait for some time.

USER: Ok.

ASSISTANT: Thanks for waiting there are no flights found on your details.

USER: That's ok, thank you for the response.

ASSISTANT: Thanks for approaching us.