You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Nancy Edwards.

ASSISTANT: How may I help you?

USER: I would like to book a ticket from EWR to IAD, can you please help me out?

ASSISTANT: On which dates you are willing to travel?

USER: I am travelling on these dates 06/02 and 06/04.

ASSISTANT: Sorry, there is no flights available.

USER: Ok no problem, thank you for your services.

ASSISTANT: Most welcome.