You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I serve you today?

USER: This is Cynthia Jones. I would like to launch a new car so I need to travel from Los Angeles, CA - LAX to Seattle, WA - SEA. Can you help me in booking flight ticket?

ASSISTANT: Sure, we are gleeful to help you.

USER: Thank you.

ASSISTANT: Can you please let me know your journey dates that you prefer to travel?

USER: I want to fly on 07/21 and return on 07/23.

ASSISTANT: Do you prefer any flag stop in  between journey?

USER: I need stop over in between my journey.

ASSISTANT: Sorry to inform you that, there are no flights are available based on your details.

USER: Ok, no problem. Thank you for giving information.

ASSISTANT: Thank you for choosing our services, have a good day.