You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how may I aid you?

USER: I am Matthew Adams. I need a connecting flight to Denver, Can you please reserve a flight ticket from LAX to DEN?

ASSISTANT: Sure, may I know your travel dates please?

USER: My journey dates are on Aug 4th and 6th.

ASSISTANT: Do you have any specific departure and arrival time?

USER: My departure time should be in the afternoon.

ASSISTANT: May I know your airline preference?

USER: I am comfortable with any airlines.

ASSISTANT: Sorry, there are no flights in this route as per your travelling details.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for reaching us.