You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I aid you?

USER: I am Charles Wilson. I am famous Beautician I need to go do make up to one the participant in Miss universe competition. So, can you please help me in booking my flight ticket from San Francisco to Washington?

ASSISTANT: Sure, may I know your journey dates?

USER: Ok, my travelling dates are 12/30 and my return date is 01/01.

ASSISTANT: Can you share your airport codes?

USER: My travelling airport codes are SFO and I have to reach to DCA airport.

ASSISTANT: Sorry, there is no flight found on your given dates.

USER: Ok, fine thank you for checking.

ASSISTANT: Thank you for reaching us.