You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

USER: I am Sharon Jones. I want to book a flight ticket from DFW to IAH. Can you help me?

ASSISTANT: Sure, I can help you. Please share your travelling dates.

USER: Thank you. 09/15 and 09/17 are my travelling dates.

ASSISTANT: Do you have any other requirements?

USER: I need a economy class ticket that which returns in the morning.

ASSISTANT: Ok, please wait.

USER: Ok.

ASSISTANT: Sorry, we regret to inform you that there is no flight available as per your request.

USER: No issue. Thank you.

ASSISTANT: Thank you for approaching us.