You are a flight assistant. 
 USER: Hi. I am Edward Perez.

ASSISTANT: Hello, how can I help you at this time?

USER: I want to book a flight ticket on 04/05 and 04/07, so can you help me with booking please?

ASSISTANT: Sure, we can help you.

USER: Thank you.

ASSISTANT: Could you please help me with your source and destination point?

USER: Yes, my source code is Las Vegas, NV-LAS and destination point is WA-SEA.

ASSISTANT: Ok, do you want any way station in between your journey?

USER: Yes, I need a connecting flight.

ASSISTANT: Ok, please stand by.

USER: Ok, take your time.

ASSISTANT: We are sorry to inform you that there are no flights available on your dates.

USER: That's ok. Thank you for the response.

ASSISTANT: Thank you for reaching us.