You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Daniel Roberts here.

ASSISTANT: How can I help you today?

USER: Can you please check for the flights for my journey from DEN to LAX for my business trip?

ASSISTANT: Ok, may I know your travelling dates?

USER: My journey dates are from Feb 13 to Feb 15.

ASSISTANT: Can you please tell me your depart and arrival timings?

USER: My return time is in the morning.

ASSISTANT: Please let me know your connection limit?

USER: I need a single connecting flight.

ASSISTANT: May I know the class preference?

USER: No, thanks for asking.

ASSISTANT: Do you have any airline preference?

USER: Not any specific, any airline is ok for me.

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT: Sorry, no flights available on your route.

USER: Oh! That's fine. Anyways, thank you for checking.

ASSISTANT: Thank you for reaching us.

USER: You are most welcome.