You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you today?

USER: I am Karen Thomas here, I want to reserve my ticket from EWR to MCO, can you please help me out?

ASSISTANT: Sure, I am here to help you to book a ticket but I need your travelling dates.

USER: Sure, my preferable dates of journey are from Jul, 11 to Jul, 13.

ASSISTANT: Do you have any specifications?

USER: Yes, I need a connecting flight.

ASSISTANT: Sorry Karen Thomas, I could not find any flight with travelling dates.

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

ASSISTANT: My pleasure, have a great day ahead.