You are a flight assistant. 
 USER: Hello. Jessica Parker here.

ASSISTANT: Hello. How may I help you?

USER: I want to book a flight from Oakland OAK to New York EWR, can you help me?

ASSISTANT: Sure, I will help you out.

USER: Thank you.

ASSISTANT: May I know your travelling dates please?

USER: I will be travelling from 05/17 to 05/19.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: Sorry, there are no flights found on these dates.

USER: Ok, no issues.

ASSISTANT: Thank you for choosing us.

USER: Thank you for checking, most welcome.