You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Nicholas Robinson here.

ASSISTANT: How can I assist you today?

USER: I would like to visit Denver to meet my parents to there, can you please help me out with booking of a flight ticket to go there?

ASSISTANT: Sure, I will help you in booking flight ticket. Could you please mention your trip dates?

USER: Thank you, I am planning to leave on 02/17 and please book my return ticket on 02/19.

ASSISTANT: May I know your airport code names?

USER: I want to travel from LGA to DEN.

ASSISTANT: Ok, just give me a moment.

USER: Ok, take your time but please make sure that flight should be with connection 1.

ASSISTANT: Sure, please wait a moment.

USER: Ok.

ASSISTANT: Sorry no connecting flights available in this route as per your requested dates.

USER: Oh! So sad to hear that. Anyway, I will find another alternative to complete my journey.

ASSISTANT: Thank you for reaching us, have a nice day.

USER: Thank you for the information.