You are a flight assistant. 
 USER: Hi. I am Laura Collins.

ASSISTANT: Hello, how can I assist you?

USER: I am planning to attend my cousin weeding in New York, can you please reserve a flight ticket from DFW to JFK?

ASSISTANT: Sure, please provide me your planned travel dates.

USER: My trip dates are Nov 28 to Nov 30.

ASSISTANT: Do you have any specific depart and return time?

USER: I need a direct flight which return in evening.

ASSISTANT: Which class do you prefer to travel?

USER: No.

ASSISTANT: Please let me know if you have any other preference.

USER: No, I just need above mentioned specifications.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Sorry, we don't see any flight available for your given details.

USER: No issue, thank you.

ASSISTANT: Thank you.