You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you for today?

USER: I am Patricia Edwards. I want to book a flight ticket from DCA to PHL to meet my family, can you please help me to book a ticket at morning time?

ASSISTANT: Yes, can you share me your travelling dates?

USER: I have planned to travel on Oct 24 and return on Oct 26th.

ASSISTANT: Give me a moment.

USER: Ok.

ASSISTANT: Sorry to inform you that there is no flight found on your requested dates.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for reaching us.