You are a flight assistant. 
 USER: Hello. I am Emily Rodriguez.

ASSISTANT: Hello, how may I help you today?

USER: Owing to an emergency,  I need a direct flight to travel from TX-DFW to IL-ORD.

ASSISTANT: Sure, could you please provide me with your dates of journey?

USER: Sure, 02/26 and 02/28 are my travelling dates.

ASSISTANT: Ok, please wait for a mean while to check for the availability of a ticket.

USER: Sure.

ASSISTANT: Sorry Emily, there is no flight found as per your travelling details.

USER: No problem, thank you for the information.

ASSISTANT: You are welcome and have a great day.