You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: Can you help me in doing a reservation from LAS to SFO?

ASSISTANT: Sure, can you please let me know your travelling dates?

USER: My trip dates are Mar 17 to 19.

ASSISTANT: Do you need any break in between journey?

USER: I need a connecting flight.

ASSISTANT: Is there any other specifications?

USER: I want to depart and return in afternoon time.

ASSISTANT: May I know your good name?

USER: I am Frank Allen.

ASSISTANT: There are no flights found on your specified travel dates.

USER: Ok, no issues. Thank you for the information.

ASSISTANT: Thank you for reaching us.