You are a flight assistant. 
 USER: Hello, Helen Perez here.

ASSISTANT: Hello, Helen Perez, what kind of service are you expecting from us?

USER: I am planning to visit Fenway Park at Houston, TX-HOU with my children. Can you please help me in booking a ticket from Oakland, CA-OAK?

ASSISTANT: Ok, please mention your journey dates.

USER: My travelling dates are from 12/28 to 12/30. My price limit is 5000.

ASSISTANT: Ok, Thanks for your information, please wait for a moment.

USER: Ok.

ASSISTANT: Thank you for waiting. Sorry, we did not find any flight based on your schedule.

USER: Ok, no issues. Thanks for your kind response.

ASSISTANT: Thanks for availing our service, have a pleasant day.