You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

USER: Ruth Hernandez here. Do you have any direct flight from EWR to OAK?

ASSISTANT: Sure, please share your travelling dates?

USER: My travel dates are 06/19 and 06/21.

ASSISTANT: Ok, please wait for some time.

USER: Sure.

ASSISTANT: Thank you for waiting, sorry to inform you that unfortunately there is no flights available by the given details.

USER: It's ok. Thank you.

ASSISTANT: Thank you.