You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: Susan Turner here. Can you please help me with booking of flight ticket?

ASSISTANT: Sure, please tell your travelling locations?

USER: I need to travel from DFW to JFK as I need to give guest lecture in New York city.

ASSISTANT: Can you please tell your travelling dates?

USER: Sure, I have planned my travel dates as 09/28 and 09/30.

ASSISTANT: Sorry, there are no flights available with your request.

USER: Oh! It is sad to hear. Anyway, thank you for your time.

ASSISTANT: Thank you and have a nice day.

USER: Most welcome.