You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Nancy Green here.

ASSISTANT: How may I help you?

USER:  I am planning to book a ticket to attend a music event at IAD. Can you please help me out to book a ticket from PHL?

ASSISTANT: Sure, I will help you. Can I know your travelling dates?

USER: Ok, my travelling dates are 03/11 and 03/13.

ASSISTANT: Sorry Green, there are no flight's available based on your traveling dates.

USER: No problem. Thank you.

ASSISTANT: Thank you for reaching us.