You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Debra Lee here.

ASSISTANT: How can I be your helping hand?

USER: I want to book a ticket from OAK to ATL, can you reserve a seat for me?

ASSISTANT: Sure. Shall I know your journey dates?

USER: I am planning to travel on 01/06 and 01/08. I am looking for a single connection.

ASSISTANT: Ok. Thanks for your time. We found that there was no flight that matches with your requirements.

USER: It's ok, no problem. I should concern another agency to full fill my trip.

ASSISTANT: Thank you and have a good day.