You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Myself Debra Clark.

ASSISTANT: How can I help you?

USER: For attending some party in IAD I want a ticket from SFO.

ASSISTANT: May i know your date of travelling please?

USER: Can you please book a flight ticket on 10/16 and the return ticket on 10/18 dates?

ASSISTANT: I am sorry no flights found as per your requirement.

USER: It's Ok.

ASSISTANT: Thank you.

USER: Thank you for the information.