You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Pamela Moore.

ASSISTANT: How can I address you?

USER: I heard that Seattle is a best place for site seeing, can you please book a ticket to SEA?

ASSISTANT: Sure, may I Know when you have planned to travel?

USER: Journey dates are 01/07 to 01/09.

ASSISTANT: Ok, please help me with your source code.

USER: Origin code is Washington, DCA.

ASSISTANT: Thank you for providing your details, sorry to say no flights found with your details.

USER: No problem. Thank you.

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