You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I aid you?

USER: I want to reserve my ticket from ORD to OAK to visit Oakland, can you please help me in booking?

ASSISTANT: Sure, may I know your travel dates?

USER: Sure, my preferable dates of journey are from Sep, 05 to Sep, 07.

ASSISTANT: Do you have any specifications?

USER: Yes, I want to return at afternoon time.

ASSISTANT: May I know your name?

USER: Sure, my name is Lisa Thomas.

ASSISTANT: Ok, please wait a moment.

USER: Sure, I will wait.

ASSISTANT: Sorry, there were no flights found on your route.

USER: Ok, no problem. Anyways, thank you for your service.

ASSISTANT: Thank you for reaching us.