You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you today?

USER: Can you help me in booking from DEN to EWR, in a normal-cost airline?

ASSISTANT: Ok, please can I know the dates of your journey to book a ticket?

USER: My journey dates are Aug 10 to Aug 12.

ASSISTANT: Ok, please let me know your specifications.

USER: I need a connecting flight.

ASSISTANT: May I know your name?

USER: Sure, I am Larry Roberts.

ASSISTANT: Ok, please let me know if your need anything else. I will check for it.

USER: No, I just need above mentioned specifications.

ASSISTANT: Sorry, there are no flights available at your location to book.

USER: No issue, thank you.

ASSISTANT: Thank you for choosing our agency.