You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: I am looking for a flight from DEN to EWR, can you help me in booking?

ASSISTANT: Sure, may I know your planned travel dates?

USER: Sure, my planned travel dates are May 07 and May 09.

ASSISTANT: May I know your connection limit?

USER: Yes, I need a connecting flight for this journey.

ASSISTANT: Is there any class preference for you?

USER: No, I don't have any class preference.

ASSISTANT: Your good name please.

USER: Myself Linda Lewis.

ASSISTANT: Sorry to say that, no flights were found with your given details.

USER: That's ok, no problem. Thank you for the information.

ASSISTANT: Thank you for reaching us.