You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am Kevin Phillips, want to travel from IAH to DEN. Please help me in booking my ticket.

ASSISTANT: I am here to help you, on which dates you are planning to go.

USER: Thank you and my travelling dates are from 12/11 to 12/13.

ASSISTANT: May I know your preferences?

USER: My departing time should be in the morning and must have one connection limit in my journey.

ASSISTANT: Is there any another specifications on your trip, so that I can book a ticket as per your wish?

USER: No.

ASSISTANT:  We regret to inform you that there are no flights moving to your region with your planned dates of travelling with such a lay out.

USER: It's ok, thank you for your help.

ASSISTANT: Welcome, have a nice day.