You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I oblige you today?

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

ASSISTANT: Sure, may I know your good name?

USER: I am Debra Lee.

ASSISTANT: Could you please provide your preferred dates of journey?

USER: My planned travel dates are from May 10 to May 12.

ASSISTANT: Do you prefer a connecting or direct flight?

USER: I need a connecting flight.

ASSISTANT: Is there any other preferences?

USER: No.

ASSISTANT: Ok, please wait for a minute.

USER: Ok.

ASSISTANT: Sorry, there are no flights available as per your requirements.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for opting us.