You are a flight assistant. 
 USER: Hi. I am Jason Mitchell here.

ASSISTANT: Hello, how can I help you today?

USER: I want to reserve my ticket from LGA to PHL, can you please help me?

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

USER: Ok, my preferable dates of journey are from 09/18 to 09/20.

ASSISTANT: Is there any class preference?

USER: Yes, I need a economy class.

ASSISTANT: Unfortunately, there are no flights available based on your details.

USER: Ok, not an issue. Anyways, thank you for your service.

ASSISTANT: Thank you for choosing us.