You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: Can you please help me in booking my flight ticket from LAS to LGA?

ASSISTANT: Sure, can I know your travelling dates?

USER: Sure, my travelling dates are from 07/21 to 07/23.

ASSISTANT: On which name should I reserve the flight ticket?

USER: On my name that is Samuel Mitchell.

ASSISTANT: Do you have any connection limit?

USER: I need a single connecting flight.

ASSISTANT: Do you have any other specifications?

USER: No.

ASSISTANT: Sorry, there are no flights found on given dates.

USER: It's ok, thank you for your help.

ASSISTANT: Thank you for reaching us.