You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello,.

USER: I am Eric Thomas.

ASSISTANT: Ok.

USER: I want to book a flight ticket to take a part in an event from DTW to DFW. Can you help me?

ASSISTANT: Please mention your travelling dates?

USER: 07/13 and 07/15 are my travelling dates.

ASSISTANT: No flights are available for your requirement.

USER: No issue. Thank you.

ASSISTANT: Thanks.