You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Laura Wilson.

ASSISTANT: What help is required from my end?

USER: Can you help me to book a flight ticket from EWR to OAK?

ASSISTANT: Sure Laura, can you share the travel dates please?

USER: My planning dates are 07/21 and 07/23.

ASSISTANT: Give me a moment I will get back to you.

USER: Ok.

ASSISTANT: Sorry Laura, there are no flights on your dates.

USER: It's fine. Thank you.

ASSISTANT: You are welcome.