You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you?

USER: Can you please help me in booking my flight ticket from SFO to DCA?

ASSISTANT: Sure, could you please share your journey dates?

USER: My travelling dates are 05/28 and 05/30.

ASSISTANT: Please wait for a moment.

USER: Ok, please confirm my flight ticket with name Michael Perez. if any you found.

ASSISTANT: Sorry, no flight is available.

USER: Ok, fine thank you for checking.

ASSISTANT: Thank you for reaching us, have a nice day.