You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: I need to meet my grand father as his health was not in a good condition. Could you please help me with booking a flight ticket from DEN to LAS?

ASSISTANT: Sure, may I know your connection limit?

USER: Sure, I prefer a lay by in between the journey which makes my journey comfortable.

ASSISTANT: Can I know your name please?

USER: Sure, my name is Nancy Edwards.

ASSISTANT: Let me know your travel dates please?

USER: I want to depart on Mar 29 and arrive on Mar 31.

ASSISTANT: Do you have any other preference?

USER: No, I do not have any other preferences.

ASSISTANT: Sorry to inform you that there are no flight services available on your given details.

USER: No worries, thank you for the information.

ASSISTANT: Thanks for contacting us.