You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Charles Lopez here.

ASSISTANT: How can I assist you at this moment?

USER: Can you please help me in booking a flight ticket from LGA to DEN?

ASSISTANT: Sure Charles, I will help you with that. Can I have your travel dates please?

USER: Sure, my trip dates are from 07/06 to 07/08.

ASSISTANT: Ok Charles, please wait a moment to check flight availability in your route.

USER: Ok, I will wait for your response.

ASSISTANT: I have found a flight in Hawaiian airlines which is having connection 1 and the ticket fare is 300. Is it ok for you?

USER: Can you please check for a direct flight?

ASSISTANT: Sure Lopez, I will check with that.

USER: Ok.

ASSISTANT: Sorry Charles Lopez, no flight is available to you with connection 0 in your route.

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

ASSISTANT: Thank you for choosing us, have a good day.