You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you with today?

USER: Myself Deborah Jones, planning to book  a flight ticket from PHL to LAS.

ASSISTANT: Deborah, can you please help me with your travelling dates?

USER: My preferable travelling dates are from 11/10 to 11/12.

ASSISTANT: Deborah, I am sorry to inform you that there is no flight available at your requested dates.

USER: That's fine. Thank you for your information.

ASSISTANT: You are welcome. Thank you for contacting us.