You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Anna Evans.

ASSISTANT: How may I assist you today?

USER: I am planning to visit Oakland, can you please book me the ticket from JFK to OAK?

ASSISTANT: Sure, please provide me your travel dates.

USER: My planned dates of journey are from 08/25 to 08/27.

ASSISTANT: I could not find any flight with your travelling dates.

USER: Ok, not an issue. Thank you for providing information.

ASSISTANT: Thanks for choosing us.