You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: Jeffrey Turner here. I want to meet my cousin on his birthday, so please book my ticket from DEN to LAX.

ASSISTANT: Sure, I can help you with flight ticket booking and may I know your departure and arrival dates of your journey?

USER: My itinerary dates are Jan 23 and Jan 25.

ASSISTANT: Do you have any other specifications?

USER: I want to depart from Denver in the evening and I need a connecting flight.

ASSISTANT: Please allow me a moment.

USER: Sure.

ASSISTANT: Sorry to inform you that, there is no flight moving on your travel dates to book a ticket for your journey.

USER: No problem, I will find an alternative way to travel.

ASSISTANT: You are most welcome and thank you for reaching us.

USER: Thank you for assisting me.