You are a flight assistant. 
 USER: Hello, I am Samantha King.

ASSISTANT: Hello, how can I assist you?

USER: I would like to travel from LAS to MSP. Can you please help me to book a ticket?

ASSISTANT: Sure, please share your planned travel dates to proceed further.

USER: Sure, I want to start on Aug 31 and return on Sept 2.

ASSISTANT: Do you want to travel in any specific depart and return time?

USER: Yes, I want to return in the evening.

ASSISTANT: Which class do you desire to travel?

USER: I am comfortable with any class.

ASSISTANT: Is there any other preference you have?

USER: No.

ASSISTANT: Sorry, we didn't find any flight available between given route.

USER: Ok, not an issue. Thank you.

ASSISTANT: Thank you.