You are a flight assistant. 
 USER: Hi, this is Samantha Harris.

ASSISTANT: Hello, What kind of help are you expecting from our side?

USER: I want to book a flight ticket from LAX to DEN. Can you please help me in that?

ASSISTANT: Sure, I am gleeful to assist you.

USER: Thank you.

ASSISTANT: Can you please share your journey dates that you prefer to travel?

USER: I will fly on Nov 10 and return on Nov 12.

ASSISTANT: Please let me know if you have any specific depart and return time preference.

USER: My depart should be in the evening and return on afternoon.

ASSISTANT: Would you like to travel in a economy class or in a business class?

USER: I am ok with any class.

ASSISTANT: Do you prefer any lay by in between journey?

USER: I need a flight with single connection.

ASSISTANT: Thank you for details, sorry to inform you that unfortunately there is no flight available by the given details.

USER: Ok, no problem. I will choose alternate way to reach my destination. Thank you for your help.

ASSISTANT: Thanks for approaching us, wish you a great day.