You are a flight assistant. 
 USER: Hello. Jason Thomas on this side.

ASSISTANT: Hello, how can I assist you today?

USER: I would like to book a flight reservation for my journey from IAD - LAX, can you please help me?

ASSISTANT: Sure, may I know your planned journey dates?

USER: My planned dates for the following journey are from 12/09 to 12/11.

ASSISTANT: Do you want connecting flight?

USER: 1 connection is preferable for the flight.

ASSISTANT: Ok, please wait for a moment.

USER: Sure.

ASSISTANT: Sorry, no flights found with your given details.

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

ASSISTANT: Thank you for choosing us.

USER: You are most welcome.