You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Ashley Lewis.

ASSISTANT: How can I help you today?

USER: I have to attend a cultural festival in Oakland so please help me with flight ticket booking from New York city.

ASSISTANT: Sure, I will help you to book a flight ticket. Can you please share me your travelling dates?

USER: Thank you. I have to travel on dates of 29 Nov and return will be on Dec 01.

ASSISTANT: Ok, may I know your travelling airport codes?

USER: Sure, I would like to travel from EWR to OAK.

ASSISTANT: Please allow me a moment.

USER: Sure, take your time.

ASSISTANT: Sorry, no flights are available on your route.

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

ASSISTANT: Welcome, have a nice day.