You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, How can I best serve you today?

USER: I want to reserve my ticket from LAS to SFO, can you please help me?

ASSISTANT: Sure, can you please mention your depart and arrival dates of your journey?

USER: Sure, my depart and return dates are from Jul, 22 to Jul, 24.

ASSISTANT: Do you like to go with a connecting or direct flight?

USER: I am ok with any connecting flight.

ASSISTANT: Can I know your good name to proceed further?

USER: Sure, my name is Dennis Miller.

ASSISTANT: Sorry, no flights are available in this route as per your requested dates.

USER: Ok, no problem.

ASSISTANT: Thank you for choosing us.

USER: Anyways, thank you for your service.